I didn't know there were these types of bitcoin scams , I have been scammed from a ebay buyer with a zero feedback
If you wait for just one confirmation it becomes infinitely harder to be scammed.
edit: also, use escrow
i have receveid 100$ btc from this scammer in my blockchain.com wallet and after this i have resended this 100$ to another my wallet that is a coinbase wallet and after this I noticed the scam