If you voluntarily paid whatever amount you deemed fair for the goods as delivered, then you got a good deal. I know of no one who would voluntarily pay money for something they did not consider at least a fair deal, let alone a good one.
I'm sure someone will come along and brag how they just bought those same guns for $100/each (there's always someone like that), but in reality, if you did your research, not just on the auctions sites, but in your area, and you feel you got a deal - then you did.
Congrats on some nice guns