Actually GMP is long gone and the original named company is back...ACME. As far as value of the older 1/18th die-casts, and I'm guessing you're talking about GMP's, they rise and fall. I have about 10+ of the GTO's. That includes the original 1st edition 1970 Orbit Orange Judge. That particular model went up in value for a while, $300-$400 for a bit, but has come way down to just over original price. I think if you want a "valuable" GMP die-cast as a possible investment, you'd have to seek out the "Tom's Garage" or "test shot" preproduction cars and take your chances later on down the road to make money on them like a real collector car. They pop up on Ebay from time to time. I collect the GTO's, because I love them...in particular, the 1970. But, I've fallen behind on them and could easily spend $1000-$1500 just to catch up. Oh yeah, I have no plans on selling them...unless the prices skyrocket into the stratosphere and I don't see that happening anytime soon. Here is a pic of just 1/18th GMP GTO's (1970-72 and, '04(not a GMP) and '05) taken some time ago. I've added a few since.