I'm looking at a local R9 that is for sale, the owner states the round count is between 200 and 250 rnds. Judging from the exterior, I would suspect it's been carried more than it's been fired.
Always remember to inspect the internals. From the pics, what is your opinion of the round count? If the round count is as low as he states, I suspect it's been ran without proper lubrication.
ETA: I lubed the pistol with EWL and EWG. It ran flawlessly for the 50rnds I put through it.