Man of Honour
A) read the post: card would have been sold at a loss after postage. (doesn't take a big brain to calculate how "excessive" the pricing could have been). Oops.
I thought I remembered this incident differently, so I went back and checked and you're being a bit economical with the truth here. :edit: or perhaps just not fully understanding what happened and/or why.
You made a GPU for sale thread in the MM when every man and his dog were listing, or thinking of listing their GPU to take advantage of the insane value of second hand cards. There were many instances of people selling cards for profit, especially those that had been bought second hand in the first place. As moderators, we have a duty of care for those that deal inside the MM, which includes ensuring that the spirit of the place is adhered to, in order protect the community. We've must have brought 50+ users who listed GPUs in to FCD - banning them temporarily to prevent a deal continuing - to ask them for proof of their purchase price. You didn't tell us your purchase price, so you didn't continue to sell it here. It has nothing to do with how much you say you paid vs how much you were charging, we needed some sort of evidence to satisfy our justified suspicion that you were making £££ on an item. Your ban was lifted swiftly once the issue was concluded. If you had shown us evidence, you absolutely could have charged what you paid + postage, no problem.