First of all, the Marvin art piece is gorgeous, jokabofe. If I had the money, I would have made the same decision you did.
Secondly, put on your helmets, because it's CHEAP BASTARD ALERT:
-Most I've ever paid for a collectible: $100.00 for the Saga Imperial Shuttle from KB (free shipping!)
-Most I've ever paid for a single action figure: $18.00 for the C3 Vader.
Years ago, I paid 35 dollars for a single basketball card (an NBA Hoops Detroit Pistons World Champions card in the early 1990s) and saw it dwindle to less than a dollar within two years. Needless to say, I don't pay a secondary market rate for anything these days unless it's absolutely necessary. I'd love to get some of the more extravagant pieces (the Code 3 Slave I and the MR Sidious saber would be the only two high end pieces I'd like to have, honestly), but I never have the sufficient cash flow to buy either one of them. Oh well, when I win the lottery and/or conquer South Carolina, this will change.