Although we dont know if the cards are indeed new or refurbished, using the scratch marks on the gold fingers is a very poor way to determine. All cards undergo testing to ensure its working before being shipped.
If the person do watch any of those factory tours he would have seen that the most common way of testing is to plug the card into the Pcie slot of a motherboard and performed several tests.
This type of testing will cause scratch marks on the gold fingers but its harmless...
The person ought to have at least check the production dates, esp component dates to know if its new or refurbished.
Btw, dealers do sometimes remove the anti static bag to paste their own labels (esp. warranty labels).