If you are selling based on revenue, it seems fair that you are required to prove it to prospective buyers (before they make an offer). This site is taking off like a rocket from what you present here, most people would not want to sell while earnings/traffic were still going up?
Because of the big spike in traffic/revenue, you really can't blame people for being cautious/suspicious - you don't have any trader history here on DNF either. You've said your minimum is X,XXX, so I would tend to believe anyone going to the trouble of talking to you would be prepared to offer that if the numbers add up.
Lots of red flags here, so don't be upset when people do lots of due diligence on this deal.