IO like the bigger models, the 1:12 but I have never seen the 250GTO in this scale. You say it's Revell, so it must be in plastic component form, am I right. I would love to get my hands on this one.
It's revell.. but it's completely diecast. It's a very heavy model and it's becoming pretty rare these days. I bought mine for about 60 euro (don't know how much dollar it is).
I also put some different rims under it. They are with much more detail then the original rims from revell. Looks much better!