I think this issue is akin to folks who post a Hennessy Hammock for a 4% discount off retail and expect it to sell, when anyone who's done a little research knows that Hennessy Hammocks typically sell for 25-40% off retail. You wish you could tell them that it ain't gonna move, but they don't listen. Seller wants what he wants and is unwilling to settle for anything less than what he wants.
You can't really make a rule for people who want to conveniently sell stuff in a package. Only the market can tell them of their delusion.