That’s hard to say without any details. Is it a head/cabinet or a combo? Is it solid state or tube? Can you give any guess as to how old it is? If it’s Marshall, I can guarantee it’s worth well over $100. Could you find the serial number on it and maybe look it up on-line?

It’s at the shop to be fixed so I don’t even know the model number. I remember it has 1–2 guitar inputs, an input for CD player or something, and I seem to remember it was the one with also a mic input. Has maybe 3–4 basic controls like bass and treble. It’s black and is in pretty good condition apart from that one button. I’ve been trying to find a pic, but I don’t even remember 100% what it looks like.

Looking at pics, it could be something like the AS50D, which I see goes for something like $300–400 new. That means over 400 euros in Europe (yes, the euro is higher, but so are the prices here). So I guess my idea to pay him 200 is quite fair, especially since he didn’t ask for money. What do you think?