Not sure how much the site would get re-auctioning it today,
even if rankings for "ebook design" went from #5 to #1-2 I feel like I can't mention fake revenues like he probably did so the price of the site would probably be < $500
If you're not going to do anything further with it, or, if it (the site) fails to do anything for you:
<$500 > $0 :-)
Right perhaps I can still do $100 a month with that with some promotion... so I'd keep it rather than sell for $500.
But I'd totally sell it for $1600 eheh