I traded an amp to a store (12 years ago)for a fretless Peavey Foundation that I knew had been hanging there for a long time. Great, great axe. Down the line it occurred to me that I should ebay me a fretted version. I have over the years bought 5 more, 3 of which I still currently own. First a 5 string ( boy was I surprised! never mentioned it in the ad, I didn't look too carefully) that was OK but not what I wanted.Needed to have its neck reset so the strings would line up evenly on the neck. Eventually strung with a high C, its slightly too narrow string spacing made it a tad uncomfortable. Next, I looked more carefully and grabbed a beautiful sunburst maple neck. Great sound but the truss rod was frozen. My guitar tech said that it was a risky operation but he was able to free it up and I tweaked it out and it replaced my Fenders.Saw another and grabbed it and it turned out to be a mahogany body. Strung it with flats. But I was still greedy. At $40 a string, this wasn't a major investment. Went for a red rosewood neck and it just didn't feel right. Pickups weren't superferrites but not the soapbars that replaced them. It was a later body and as such just didn't feel like the earlier ones. Even after I put Nordstrand big singles in it, it just wasn't doing it for me. Put it up here on TB and after selling it went back to the 'bay and waited for exactly what I wanted: a match of my fretless. Pulled the trigger on a black, rosewood neck ( black headstock) Foundation that was spotless. Gem condition.
Sooooo, you takes yer chances with anything thats not in your hand. I gambled 5 times:2 didn't stay, 3 needed additional work, three are left ( + the fretless that started this whole mess makes 4). If you know how to adjust a bass, are willing to expose yourself to risk, go for it. If not, try before you but is still the safest policy.