wheel - 6:02 pm on Mar 12, 2011 (gmt 0)
I'd snatch the money out of their hands so fast I'd leave them with papercuts. You're selling a non-tangible, repeatable asset in an industry where good offers are few and far between. There's a pretty good chance you'll never see another offer like that again.
You'll have a bit of melancholy after selling a site like that, but you get over it :).