Oh man, vintage MOTU. Most of mine don't even stand up, because I played with them for hours on end. Of course, I never bothered to get the Slime out of the figure's leg areas, so that might have corroded the rubber bands over time.
I think with the money I've recieved for my modern stuff, I'm going to buy the Commemorative Series exclusive 5- and 10-packs. After that, since my LOTR collection is almost finished, I'm going headfirst into vintage MOTU, all the way.