Tesla is getting less money than they should for these cars because they aren't allowing people to inspect them before purchase.
Rookie business mistake.
It's reasonable to start the listings at high prices and keep dropping them until they sell (it's called a Dutch Auction), but they're not doing the other things they need to do to get decent revenue out of them, like letting people inspect the cars. At this point, given Tesla's history of selling used cars with serious defects, I'd wait to buy from Tesla until I could get $10K discount versus a private party (with inspection) purchase. Others will eventually do the same.