Sorry, TOU, but SnakeEater is right. I bought mine about two years ago, and it wasn't new when I bought it. Mine is a very early one, evidenced by the lack of a flash hider (the Clinton AWB was still in effect when it was made) and the polygonal rifled barrel. I knew even then that I had found a good deal, because the package included 1,000 rounds of Argentine 7.62x51 and a half dozen mags.
I don't buy many new firearms. Instead, I decide what I want, put the cash aside, and wait for the right deal to come along. My Arsenal was also a smokin' deal at $395, considering milled Arsenals sell for $1,000 and up these days. I stumbled on it in a gun shop I used to frequent in Tennessee. It was "used", but you'd never know it. I doubt it had ever been fired. Again, it's a "ban era" model, so it has a pinned on muzzle brake instead of a flash hider, and no bayonet lug. I'm quite willing to do without a flash hider and bayonet lug if it means I can have a high quality rifle at a 50% discount.
You could say that I've been lucky. As my dad says, though, "luck is just the intersection of preparation and opportunity." Know what you want, be prepared to buy when you find it, and keep your eyes and ears open. The deals are out there if you look for them.
Even if you pay retail for a new PTR-91, though, I consider them to be good values. A genuine Heckler & Koch model 91 sells for $2,500 to $4,000 depending on condition, features, importer, accessories, etc. A brand new PTR-91 is arguably just as good a rifle and will cost one half to one third the cost of the HK91.