Good condition, works great sounds good.

Used Marshall JCM 800 2205

how much would you pay, not prefer to pay, but MAX possible
Mesa Single Rectifier
Marshall 1960A vintage
Rg3exfm1 w/ EMG 85/81
Big Baby Taylor Acoustic
Ibanez TS808
£400 - they are some of the 'worst' 800s for me....

Still, it is a good Marshall. I have had one for £375