Supro Thunderbolt S6420 — Amp Resale Value
AmpsWhat a used Supro Thunderbolt S6420 sells for on Reverb (median of 2 recent listings).
Supro Thunderbolt S6420 value — Used $2,500. Prices updated August 2026.
Live on eBay right now
Expired listings — price reference
Excellent Origonal Vintage 1967 Supro Thunderbolt S6420 1x15 35wt. Combo AmpeBay 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
- Supro
- Make
- Supro
- Model
- Thunderbolt S6420
- Year
- 1965
- Finishes seen
- Mint, Blue Rhino
- Used range
- $900 – $2,499.99
- Sample size
- 2 listings
Supro Thunderbolt S6420 resale value
The used Supro Thunderbolt S6420 has a median Reverb asking price of $2,499.99, ranging from $900 to $2,499.99 across 2 current listings.
What drives the price
For a used amp, tube vs solid-state, original speakers/tubes, wattage, and tolex/grille condition 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 | $2,500 | eBay sold comps |
| Live asking — low / typical / high | $850 / $1,499 / $2,000 | 4 live eBay listings ↗ |
Market check: As of July 21, 2026, 4 live eBay listings ask $850.00–$1,999.99 (median $1,499.00). Asking prices sit about 40% below the typical sold value of $2,499.99 — a window worth checking for buyers.
Frequently asked questions
- What is the typical resale value range for the Supro Thunderbolt S6420?
- The current resale range for this 1965 model is between $1,200 and $2,799.99.
- Are there many Supro Thunderbolt S6420 models available?
- Currently, we have a small sample size of 2 listings for this specific model.
- What year was this Supro amp manufactured?
- The Supro Thunderbolt S6420 was manufactured in 1965.
