Oh, for crying out loud. The OP said a 10-5 and I read it as a 19-5. My eyes are just as old as the rest of me. Sorry. No known problems with a 10-5. Shoot away until your trigger finger wears out.
Wait, OP did say 19-5 at first. OK, same thing. Shoot a 10-5 all you want.
That price is probably pretty good for the condition but I don't buy collector guns, I buy shooters. If you want a LNIB gun then buy it. I would look for a $300 shooter grade, myself.