I'm new to collecting the vintage toys, well the non cheap ones. I always find it difficult yo gauge whether its a good deal or not, especially with the "Grail toys" like the Action Master Elites for Example. at Botcon all four were mint on card for $2000 so thats $500 each. but loose? do you half that? how much to subtract for wear? or damage? I'm sure this has been asked and answered before I know there isn't an exact mathematical formula to it, and only experience will teach you. Has anyone got any general pointers to set me in the right direction?