Absolutely a demand for this. Are you a native speaker? Would you mind telling us a little more about yourself?
Hello jwzguy - I have been working out here in Japan for 5 years now so, pretty established! Started as a teacher at schools, still teaching now too but, for corporate clients/adults mainly these days. I've been studying Japanese since the beginning - I'm not a scholar or anything but I can hold my own during conversations (easier) and reading through websites/magazines, etc isn't a problem anymore (unless it's on something particularly specialist - then I need my dictionary!).
Long history of selling online at auctions/forums (in UK, where I am from, and in Japan too) - can give you some of my feedback etc, no problem.
Let me know if there's something you would like in particular. I remember how hard it is to see what's out here from afar but, if there's anything at all you've seen or been interested in please just ask - I will do my best to explain/help.
Cheers!