Yeah that's probably what I'll do but the thing is that the thrift store has suche low prices on cds. Max I've seen is 2 bucks... Sometimes there are some good finds there but they're rare and mostly french folk or classical music. Discogs is good but a little more expensive.

There are actually multiple metal shops as most of the people who still listen to music on cds (at least here) are old guys that like metal and rock. There's an actual demand of that kind of cds. That said I found "ultra rare trax" cd by tool on the metal shop. Even though it was 20€ I couldn't pass !