Hotbodies d4 and d2 buggies

[Graemebaillie]

Picked up a bunch of buggies which i dont know much about.

I believe they are hotbodies d4 and d2 prototype buggies.

D4s are belt drive and shaft drive hence why i think the belt drive is a prototype?

The d2s i dont think were released at all?

My question is really are they worth anything when i rebuild them and are they collectable.

Only thing i think im missing are shells