Austin Gun Liquidators has had the best new prices in my experience, exuding the repetitive stuff that you can get at Academy. GT Distributors by far has the best used prices. CenTex Gun Works has the lowest transfers, so them +internets wins
+1 for Gun Connection in Taylor. I dealt with them several times now, and they are very helpful, and go the extra mile to find what you want if they don't have it already.