There is a card I really like priced pretty well but after sales tax and shipping turns into a "just ok" buy. Now, if I get an eBay bucks promotion of 10% or so it would for sure tip me over to pulling the trigger on this purchase..... However, as I wait around for that someone else could come along and make the buy.....The seller is a big time seller who I don't think negotiates much or has the time to respond to a "would you take x% lower" so I'm not even considering that route.
What do I do?

P.S. I'm not going to disclose which card! LOL