This thread may ruin your sale if the buyer finds it. wouldn't be hard to find after its indexed. it would probably be in the top results if you google the domain name
Unless you're independently wealthy and just like to play negotiation games to amuse yourself, I suggest you take the $225 and $5600. If nothing else comes through the $225 is a 3500% return, something you'll rarely see in a period of just a few days, not to mention ...ever!!
Take the money and run (fast and far!)!!!! :D