"Playing around" with their valve guild I was surprised that the only cars that I I could find that showed an increase in value were the fox body cars (At least the 87 to 93 GT drop tops.) The others I looked at (about 15 standard 60's 70'smuscle cars) were either flat or down in value. I'm sure there are others cars going up but its nice to see the people taken notice of the Fox body cars.