The sale was 55 keys and a quick sale

Question: Why should quicksell buyers not be used as evidence for suggestions on backpack.tf?

Answer: Quicksell buyers buy for a lower price knowing that they can resell the item for a higher amount. If a quicksell buyer is willing to pay a key for an item worth 1.5 keys then that means it would not be a good idea to suggest lowering the value of that item to 1-1.5 keys or even 1 key since these sellers are only there to turn a profit and are fairly confident that his or her price will ensure one. Quicksell buyers are actually a great indicator that a price is still strong when multiple people are still paying just slightly under market value in order to sell for current listed market value. However this does not always mean that quicksell buyers can never be used as proof. If a quicksell buyer gets so overwhelmed with a certain item or appears to have a high level of traffic flowing into his backpack, then it would be a start on a possible suggestion in order to lower the price of an item though you would need to follow up on the buyers side in order to see if traders are having difficulty selling for the currently listed suggested price range.