After the patch, I can't seem to find my bought item in my inventory. It was a Mega Magnus, there was no mail, no chat notification, no item found in my handgun inventory slots.
However the game did record my purchase. I expect some kind of compensation, or at least give me the item, I earned for :l
I just got this same bug as well. I bought a recipe with a buy it now and nothing ever came of it :(