Ah, but what if they conspired to purchase the item using fellow bidders to deflate the price (oh wait that is was another debate).

ONe issue what reasonable care did the buyer take? What if the magazine used a copy of a photo of the shirt at the thrift store to try and save money actually getting the photo of the original. Hmmm.

Doesn't change the answer to the original hypo. If I am a juror on the issue, I am bound to rule based solely on the evidence presented and not to speculate what else could of been. Hence based solely on the evidence, the seller of the shirt as a Pricess Di would be liable.