Either way, if you have the $35 to spare it can be fun to play with.
If it's an older one, parts are still available, and actyally you can find upgrades around too. You can go to constant air, speed loaders, new speed bolts, etc...
If it's the PGP2, i've never had my hands on one. See if your friend will let you try it out in a game first.
P.S. Yes, $35 is a good deal. The old ones can run $50 or so used. They're kind of collectables, but people also buy them to customize. There are shops that convert them to semi and direct feed and such, but it costs. PGP2's are like $80 new, and I don't know if anyone is tinkering with them yet.