Review my Startup, MotoListr.com
sam_in_nyc: This is an idea that requires reaching a "tipping point" in order for it to work.  It could work, but you're going to need a solid strategy for getting people to adopt this over, say, craigslist or one of 20 other classified sites.Being "incredibly simple," at this point, is probably not enough to get enough people using it.Best of luck