https://flippa.com/2739829-sortfolio-com-web-design-marketpl...
What was the point of a public auction if you were only going to answer questions to private bidders contacting you directly? And why list it at all when you were trying to sell outside Flippa, in violation of their listing terms? Assuming that you were acting in bad faith, abusing Flippa as a mere marketing tool for a private sale, would be uncharacteristic for 37S.
Flippa contacted us after we posted Sortfolio for sale on our blog (http://37signals.com/svn/posts/3172-sortfolio-going-once-goi...). They asked us to list on Flippa too. So I said, sure, we'll list it on Flippa too. I couldn't include specific information the way I wanted to include it, so I didn't include everything in that listing. I got a few private inquiries, they didn't go anywhere, and they seemed lower quality than the leads we were getting from our blog. So we turned most of our attention to leads generated on our blog since they were of higher quality and better qualified (fielding qualified leads properly is time consuming).
Flippa may not have been a great fit for Sortfolio, or we may not have been a good fit for Flippa. I could have tried harder on Flippa, but I have limited time and when one source generates significantly better leads than another source, you have to make a decision where to spend most of your time.
The people behind Flippa were great - they were helpful and kind. I don't have anything bad to say about the experience. If nothing else, we didn't give it enough of our attention. Lesson learned.
I hope that was helpful.
Your comments on buyers needing to qualify themselves to get a response is right on. Professional buyers pitch themselves to sellers as much as the other way around.
I'd think that anyone ready to spend $400k on a site would have the willingness to get in direct contact with the seller, and that this "Rise of the White Knights" episode on HN is not based in reality.
Success to you!