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Pair mullard kt66 vacuum - pair,
$399.00
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Genalex gold lion - gold,
$99.99
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Electronic kt66 beam power - beam,
$99.99
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Sovtek tubes 4 - kt-66, 4-pack
$144.00
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Genalex gold lion kt66 power - genalex,
$129.99
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Lot kt66 tubes - of,
$3750.00
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Platinum factory match - platinum,
$219.30
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Electron tube tubes - tubes,, new
$400.00
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Vacuum tubes valves kt66 - vacuum, ef86
$400.00
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Tad kt66 premium matched - tad,
$93.95
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Matched pair vacuum - 1,
$119.61
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Brand new tung sol reissue - tung-sol,
$160.00
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6p3s tubes matched - 6p3s-e, nos
$69.00
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New matched pair genalex kt77 - new,
$59.99
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Brimar 6l6g cv1947 - 6l6g,
$390.00
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Pair tad rt824 kt66 - tad, vacuum
$85.00
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Marconi kt66 tubes quad nos - kt66,
$2799.00
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Genalex gold lion - genalex,
$120.00
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Matched pair tube amp doctor - pair,
$128.00
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Matched quad kt77 power - jj,
$95.00
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Sunvalley mono blocks tubes - sunvalley,
$1795.00
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Ruby kt66c kt66 - audio, power
$250.00
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Platinum factory match - factory, 6pcs
$308.79
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6l6gc kt66 general - electric, ge
$349.99
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Rare mullard el37 - tube, nib
$225.00
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Matched pair vacuum tube - 1,
$130.00
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Genalex gold lion kt66 power - gold,
$24.95
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Dualdiscgetter 6l6gc - dualdiscgetter,
$275.00
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Matched quad tube amp doctor - tube,
$256.00
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Genalex gold lion kt66 vacuum - lion,
$325.00
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Nos platinum match pair - match,
$400.00
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Kt66 marshall premium - kt66, matched
$210.21
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Genalex gold lion kt66 - genalex,
$274.99
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Gec kt66 british old stock - kt66,
$250.75
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New current matched - current,
$153.35
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Genalex gold lion - genalex, new
$285.00
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Clean super matched pair - clean,
$179.00
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Kt66 guitar tubes matched - tubes,
$79.25
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Kt88c vacuum tube valve 4pcs - ,
$335.00
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Tesla kt66 tubes - tesla,
$299.00
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Kt66 lve vintage retro style - lve,
$200.13
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Genalex gold lion kt66 - genalex, new
$132.50
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New matched pair psvane - new!!!, 1
$278.07
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Vintagenos usa 7027a - 1x,
$349.00
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Matched pair gec cv1075 - pair,
$650.00
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Kt66 power vacuum - power,
$55.95
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Factory match - edition,
$339.15
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Amplifier tubes kt66 - tubes,
$250.00
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Kt66 genalex gold - genalex,
$259.00
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Genalex gold lion - lion, new
$69.50
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Kt66 grey glass matched quad - kt66,
$935.00
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Brand new tung - brand,
$107.54
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6l6g 5881 6p3p kt66 - us,
$288.00
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New current matched - new, (2)
$150.77
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Kt66 ars replaces - ,
$40.95
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Kt66 electronic matched - kt66,
$114.58
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New current matched octet - matched, (8)
$594.79
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Pair kt66 power - power, vacuum
$111.90
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Pair genalex gold - genalex, lion
$145.00
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Genalex gold lion kt66 power - kt66,
$246.98
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Nos 1959 pair - 2, matching
$179.99
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Quad genalex gold lion - genalex,
$271.80
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Gec kt66 pair vacuum - pair, tubes
$398.00
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7581a kt66 6l6gc - ge,
$75.00
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Kt66 genalex gold - gold, matched
$129.50
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Groove tubes kt66hp guitar - groove,
$99.00
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New reissue genalex gold lion - reissue,
$75.42
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New reissue genalex - reissue, gold
$71.97
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Kt66 electronic matched - kt66, jj
$57.79
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Nos marconi osram - nos, kt66
$277.97
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Rare nos 6l6 6l6g kt66 - 6l6,
$249.64
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For gold lion golden - lion,
$55.77
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Brand new tung sol - tung-sol, reissue
$105.73
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Rca 7581a vacuum tubes - pair, of
$433.13
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Quad kt66 power vacuum - kt66,
$223.80
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New current matched - current, (4)
$299.99
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2pcs lot new kt66 matched - kt66-z,
$213.38
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Strong genelex gold lion - gold, kt66
$149.99
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Shuguang kt66 z treasure - kt66-z,
$107.80
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6p3s tubes matched - 6p3s, nos
$29.00
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Matched pair shuguang - pair,
$89.99
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Matched quad gec cv1075 - matched, (4pcs)
$1250.00
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New current matched quad - current,
$305.12
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Russia philipsecg 6l6 gc - 3,
$70.21
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Kt66 6l6 sovtek tube gray - 6l6,
$40.50
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Tube retainer spring - , for
$8.97
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Genalex gold lion kt66 - gold,
$55.00
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Rft 6l6 6l6gc - 6l6g, kt66
$279.00
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Kt66 marshall premium matched - kt66,
$105.10
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Rare italian vintage mullard - rare,
$212.54
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Kt66 electronic matched - kt66,
$229.16
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Gold lion kt66 vacuum tubes - vacuum,
$189.99
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Rare vintage 1930 platinum - ,
$180.00
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Brand new tung sol - brand, tung-sol
$51.32
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1matched pair kt66 - 1matched,
$269.22
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Mullard kt88 power - mullard, vacuum
$300.00
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Looking for more kt66 tubes?
Search eBay live — fresh results filtered for the best value, updated every hour.
Browse 96 kt66 tubes listings currently in our index. Prices range from $8.97 to $3750, with an average of $298.21. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about kt66 tubes →
Try this: sjpd | cat 6e | 12 pc | jordan 3 | 68 vette | mr16 led | vw ecu | keurig b31 | ctp | cg 5
Whether you are looking for a brand-new or second-hand kt66 tubes, eBay offers one of the largest selections available online. With 96 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at $8.97, while premium listings can reach $3750 — giving you a wide budget spread to work with. The average price of $298.21 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.