The best-selling modelling amp; MkII and Gen 3 versions coexist on the used market.
Prices are computed from recent UK (GBP) sold listings and refresh daily.
| Source | Listing | Condition | Price | Deal |
|---|---|---|---|---|
| eBay | 1,400 Patches BOSS KATANA 50 MK-2 (MKII) Preset Tone Library | Nuovo | £8.18 | excellent |
| eBay | 700 Patches BOSS KATANA 50 MK-1 (MKI) Custom Tone Preset LIbrary | New | £8.39 | excellent |
| eBay | 4 channel foot switch for Boss Katana KTM 50 amp | New | £38 | excellent |
| eBay | BOSS Katana-50 MkII 50W 1x12 Modelling 2-Channel Combo Amp for Guitar | Used | £193.1 | good |
| eBay | Boss Katana-50 Gen 3 50W Combo Guitar Amplifier Black | Used | £199.99 | good |
| eBay | Boss Katana 50 MKII 50W Guitar Amp Amplifier with Effects | Used | £208.7 | good |
| eBay | Boss Katana 50 Gen3 50-Watt Guitar Amp Amplifier with Effects | Used | £249 | good |
| eBay | Boss Katana 50 Gen 3 50-Watt Guitar Amplifier Onboard Effects - Brand New | New | £264.99 | fair |
| eBay | Boss Katana 50 Gen 3 1x12 Combo Amplifier | New | £285 | fair |
| eBay | Boss Katana 50 Gen 3 1x12 Combo Amplifier | New | £296 | fair |
Deal ratings compare each asking price with the recent sold-price median. Some links are affiliate links — they cost you nothing and support GearSnap.
As of July 2026, a used Boss Katana 50 in the UK typically sells for around £265. Anything under £209 is a strong price worth moving on quickly; between £209 and £296 is the fair-market zone; above £296 you're paying a premium that usually only makes sense for mint or boxed examples.
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