Hmmm....so many answers to this question.
$80 for the Volume 1 MPC
$190ish for a shipped Robotech SDF-1 off of ebay when that was the going rate for them. The kicker is that I just noticed the other day that one of the shoulders isn't attached properly.
Oh yeah, plus I bought an auction for an Orguss Orgroid, a yellowed stickered Bandai Strike Valkyrie, and some other stuff last year for $450. It made me feel better when the Strikes weren't reissued but it still seems like a lot of money.