That's less than I paid for mine in like the late 90s. Hell of a deal if not broken or anything I tend to say.
PSS probably means Police Special Sniper (or similar), but "sniper" is scary so Remington denied that, only referred to it by the TLA. Changed the name to the "P" later, claimed that stood for "Parkerized" not Police. No one believes them.
Normal 700 SA with a releasable floorplate, in a perfectly serviceable palm-swelled HS Precision stock. Or, drop into the zillions of options for other stocks and chassis. Mine — and most AFAIK — were mated with heavy 26" 5R barrels. Mine will do 1/2 MOA all day with good factory ammo, and 1/4 if you handload for it. Shoots everything well, but especially 168 and 175s. I've hit (lately) at 1100 yds with the 175s. I know it'll do 1400 someday; half a dozen shots right inline, but never /quite/ could chase the horrible, variable wind that day!
Barrel is stiff enough I get +/- no deviation with a Magnetospeed, or a suppressor (comes plain, I had it spun off and threaded), or both! Trigger will probably be one that kills you, so change it, which also will make it easier to shoot to the potential.
Parkerized bolt is not super smooth from the factory. Shoot it a few hundred times and it'll smooth out, if he hasn't already shot it plenty.