Marshall KT66 — Part Resale Value
TubesWhat a used Marshall KT66 sells for on Reverb (median of 2 recent listings).
Marshall KT66 value — Used $228.34. Prices updated September 2026.
Live on eBay right now
Expired listings — price reference
6L6 & 12AX7 / ECC83 Valve kit for Marshall JTM45 Bluesbreaker guitar amplifiers
KT66 MARSHALL PREMIUM Matched QUAD TUBES GOLD VLVE-00077 (4x tubes)
Marshall KT66 Tube/ Valve Model No. Vlve_00077-UNTESTEDeBay removes ended listings after ~90 days — we keep the prices. Look up finds current listings for the same item.
Price data verified against · 1
Item details
- Brand
- Marshall
- Make
- Marshall
- Model
- KT66
- Used range
- $114.17 – $228.34
- Sample size
- 2 listings
Marshall KT66 resale value
The used Marshall KT66 has a median Reverb asking price of $228.34, ranging from $114.17 to $228.34 across 2 current listings.
What drives the price
For a used part, condition, compatibility, and originality move the price most. Vintage and limited runs command a premium; player-grade and modified examples sell for less.
Price guide
What this actually trades for — sold values by condition vs. what sellers are asking today
| Condition | Value | Based on |
|---|---|---|
| Used | $228.34 | eBay sold comps |
| Live asking — low / typical / high | $8.97 / $189.05 / $9,434 | 15 live eBay listings ↗ |
Market check: As of August 14, 2026, 15 live eBay listings ask $8.97–$9,434.16 (median $189.05). Asking prices sit about 17% below the typical sold value of $228.34 — a window worth checking for buyers.
Frequently asked questions
- What is the current price range for a used Marshall KT66 tube?
- Used Marshall KT66 tubes are listed in the range of $114.03 to $228.05.
- How many Marshall KT66 tubes are currently listed?
- There are currently 2 listings available for the Marshall KT66 tube.
- Are these tubes in good condition?
- The provided facts only state the price range and listing count, not specific condition details.
