
Quoting
flyingron
Most likely so. I actually am actually a board member (and the webmaster) of a 501(c)(3) organization with a attached internet forum. The operation of the classified section of our forum is so inconsequential to the overall funding and mission of our activity that I'm not going to lose sleep if people make a profit (either personal or business) on a sale there. In fact, we list information on commerical activities as well as accepting advertising from commercial entities. Yes, we do have a lawyer to advise us on this thing. Most 501(c)(3)'s should likely have one as well.