Yeah, GB is probably the place for you. I do think some guys on GB are bidding up their own items though. If you look at the bidding history for some of the 300 PRC brass and ammo you'll see a lot of the bidders are "NR" with no feedback and it sure seems funny that many of them became new users on the day the auction was listed.
There's 100 pieces of new Hornady 300 PRC brass ending today on GB that's already over $500. CRAZY!!!!!
I recently had the opportunity to buy 40-50 boxes of Hornady 212gr 300 PRC ammo for $49.99/box. Hate to admit it. but I was very tempted to buy it all and resell it. I probably could have and still could(last I checked) make around $2,000 reselling it. Instead I only bought 6 boxes and pulled them just for the brass.