So I haven't really played my Marshall JMP-1in a long time. I have several "British" voiced amps, so I'm considering letting this one go. It's in good shape for a 20+ year old preamp. It's currently racked up, so I can't see if there are scratches on the top or not, but I'd assume like all rack preamps it has some. I am not the original owner, so I don't know if these are the original tubes are not, but they work fine. No manual, no foot switch.
Looking at the sold listings on eBay, $500 + shipping seems to be a fair price.
If there's interest in this, I can post pictures.
For references... I've done deals with Chris, Mike, Noodles, Elysian, Jacksonplayer, James, Greg, etc.