wheel - 7:21 pm on Nov 28, 2011 (gmt 0)
Well, I'd suggest this.
"Thanks for your offer, I appreciate it. I am interested in discussing a sale. However the site is currently receiving about 25,000 visits a month and in light of that I believe an amount of (2X their offer) would be more appropriate.
If that's acceptable, feel welcome to contact me by email or by phone, we can get the process started today."
That last thing I did there is a little extra something sweet :). Give them some enticement to get it off their plate. Like the deals already done, just got to get that little payment thing out of the way.
Then see what they say (and keep us posted - I love reading success stories).