Collectible,I'd reckon the 450,or 480.
But,being the owner of an '88 CR500,I like the simplistic race bred look of this model.
Also the power is quite smooth,and for a big bore bike,its a good mannered bike. Point it and thats where it goes,the suspenion is top notch too.
Wether or not its collectible is up to the individual.
Cheers,Mark.