I had one episode like that......not saying the guy was dishonest but lets just say I bought a gun and it supposedly had a box and half shot thorugh it and the guy just didnt want it anymore. Well after using Hoppes benchrest twice I had to finally take it to my gunsmith to have all the copper fouling electronically removed because the barrel was fouled out so bad. The key was after all this I started shooting it and the gun shoots incredible. My take was, the guy shot it alot and the groups started going away and he didnt know about copper fouling/removing so he got rid of it. I got the gun for a good price so I made out on the deal.