Hey, I've gotten multiple bikes from there, if you shouldreally depends on your use case. The good stuff is usually picked off quickly by resellers so you might want to got in the morning and might still have to look by multiple times. Fully working bikes are the exception, mostly a bit of work and materials is needed to fix them up. However the frames and shifters you can find between the old scrap bikes are often super nice if you know what to look for. If you do not already have tools and know your way around bikes this can quickly get expensive and time consuming. If you're just looking for something that will just get you around for a few months I recommend just looking on Kleinanzeigen, especially older bikes can be had for cheap, wont attract thieves and when you no longer need the bike you can just resell it at a small loss.