While it may be likely they were trying to scam by representing trip wire hooks as keys there is no proof of him saying "bid on the auction for keys" or something similar. It is not against the rules to auction tripwire hooks. Without some evidence of him saying they were keys it is technically not scamming. Thank you for the report though
the tripwire hooks name was changed to crate keys ,,, i have both them still. so with that it is scamming.
Just for future reference, this is what it looks like when someone is auctioning crate keys. I'll deal with it.