I have attended a few MicroConf's where patio11 is a regular speaker, and from his "selling BCC" talk it sounded like feinternational will help you figure out if it is a good deal to work with them.

What's to loose other than a few hours of work filling out their questionaire about your business?

I understand, but what I am suggesting is looking in their "sold listings" to get a benchmark on how much your startup is worth.

IMO it answers your post question much better than any HN commenter might do (except if a HN commenter is willing to actually buy your startup)