That would be a fair price for a 342 in nice shape that pumps up, hold air at least for a while, and shoots hard (buries pellet in pine board). Vintage Benjamins have lead seals, and are hard to work on, need special tools, or pay about $75 for a reseal job. A .22 pellet at 650 fps should be good for squirrels and rabbits, and maybe bigger stuff with a good headshot.
Are you referring to Air Gun Repair Service in Gonzales? If not, whose work are you familiar with?