I've purchased many NIB pins.
Honestly, I wouldn't mind "if" my OOB (Out of Box) GB prem didn't need the attention it needed like; Slimmer's ass dragging all over the place, air balls o-plently, coils dialed in correctly, and lastly seeing "if" the playfield or cabinet had issues (ghosting / sunken inserts / miss matched side rails / side art done incorrectly; etc.). I would certainly buy it with a few miles on it without these issues from a reputable distributor.
Note: my GB prem doesn't have the PF or cabinet issues that many GBLE buyers have. I do hope they get taken care of tho.