Any reel that hasn't been maintained is likely to have bearing problems. That said, there are no none gear or frame issues with this real, but the pinion gear bearing doesn't do well with abuse. The pinion gear bearing is open to the atmosphere when the spool is removed. This does two things, one it makes it easy to oil, but if the spool is loose and it's raining hard then moisture can get in on the bearing.
Maintenance is important with any reel. I'd say take the chance. At worst you might have to put a bearing or two in it. Does the seller have ratings from other customers?