I second the idea (4th or 5th?) At anyrate, I went to a business seminar (introduction to supervision) and I fail to see any liability issues in regard to this matter as long as the appropriate disclaimer were put up etc. I mean, we can post our stuff for sale right now.
I have an older saitek rig that mostly works I will sell it cheap. Respond to me if you are interested...
There... Now is hitech liable for that?

Having a forum to direct this traffic is a good idea.