I recently dipped a toe into the S/H market place, having got that bug that's been going around - lockdown guitar buying-19. I had a fancy for a P90 loaded SG and went to look at one. Plus points, it looked mint and played great. There was a little scuffing on the case, but nothing serious. However, The volume control for the bridge pickup did zip until it reached halfway, and at max volume it was still pretty quiet. Common problem I hear you say - but on my humbucker loaded SG no such problem. Looking again, this was obviously a known fault, the bridge pickup had been raised to the point that it was rattling around loose. Now, I could have adjusted it back down to see what happened - except that the one thing missing from the case candy was the tool kit. Another minor detail, the jack socket was a bit tight - but my own SG has that too (why SG's? I've never had that on LP's or 'birds). Anyway, the seller couldn't make enough adjustment price wise for me to take it and we parted amicably. .....But I've still got that damned bug!