Are these rare?

Hey guys and gals....haven't posted anything new for a while, had this for about 2yrs now and only found it lurking in the bottom the cupboard. Got it from a member in America, box is a bit battered but the car itself is a minter, everything is there to run apart from charger....at the time I thought I'd get a few cheeky upgrades as in last pic, gonna get me some bearings, put 'em in the box and put it back in the cupboard 'cos I can't bear to run it.

I think I've only seen around 2 of these posted on here so must be pretty unique/rare, anyway, I've got one and love the look of it, especially next to the 1/10 version, looks like a marvel of miniature engineering, also have the 1/32 Junior version too