For information about how to use this forum please check out forum help and policies.
If the bass is in good shape, the neck is straight, and you like it, for that money I would take it. Change strings, electronics and PU and you should have a more than decent instrument for 350 euro. If the PU is good you can reuse it or sell it once you upgrade your bass.
I have a shitty Yamaha bass that I keep only because it was signed by Darryl Jones. As a matter of fact, equipped with SD's antiquity p-bass pick up, new electronics and played through a beautiful B15, it sounds good enough to me.