I use Euless Guns & Ammo in Euless Texas. I've bought several guns from these guys and they have taken care of me. They are located on Hwy 10 in Euless just west of hwy 157 right beside the police station. They are not the cheapest but they will deal with you and they do take trades and consignment guns as well. They also have a full blown machine shop and even make fully custom rifles.