A couple of the piece in the upper right might be authentic, but the majority of the pieces in the frame look like average quality reproductions to me. Probably not worth $200 to a collector of reproductions, and piece by piece on eBay you could buy a better set of reproductions for less.
If they were authentic you'd be looking at a couple grand in points, and given the number of collectors and dealers in your area the pawnshop has an idea of the potential value and has priced them accordingly. When I actively bought relics in Louisville, I knew every pawnshop, every auction house, every antique store and most would call a couple of different buyers when anything native american walked through the door. If it was still in an antique store or pawnshop after the buyers looked it over, it was either authentic and priced at market (or often higher than we would pay) or it was a replica and priced accordingly.