Those who paid more, or recently bought a car, come on, prices change. If the prices went up, you wouldn't be offering to pay more, then why demand a refund after prices went down? It's a rhetorical question of course, the actual answers is that everyone always wants money back but nobody wants to pay more. Bottom line is you got what you agreed to pay for, what happens after is irrelevant, so why let it spoil your mood? Ever bought or sold stock?
In the interest of full disclosure, I got a 60 upgradeable to 75. As for the $2K price, funny thing, probably would have bought it when buying a car, but now that we've had the 60D, I realize that upgrading to 75D would not provide $2000 worth of benefit for us. If it was $500, I'd get it on the spot, but no more than that. At $1000 I'd probably wait for when and if we need to do a far trip with the both cars together, which will probably never happen. The thing is, the last 10% or so of the battery is not as useful because I'd rarely charge to 100% (on the 85 in 2 years I charged to 100% maybe 8 times, 5 of those on a coast to coast trip where I wanted to cruise at high speeds between superchargers). But, I am not going to get upset if the upgrade price never does go down, or even if it goes up. I got what I agreed to pay for, so no complaints here.