ebay-fu
Ebay-fu is when you’re so good at ebay, you can beat anyone at a bid war and still have money left to buy pizza.
He sniped my bid for a bike. I sniped his for a pizza. I won both.
She outbid me for a TV. I outbid her for a toaster. Now we’re even.
We had a bid war for a watch. I won. Then I bought her a pizza.