I vote to keep posting the lists. They're not that frequent, and everyone's computer has a functioning Delete key.
Personally, even though I'm not currently in the market for a car, I find the lists interesting as a way of seeing what's out there and what prices are like. Eventually, my car will wear out and then the lists will be directly useful to me. Sorting through pages of Craigslist entries to find the few that are makes and models I might be interested in is pretty tedious.
