User blog comment:Gingerthefoxx/Why are some RIMS worth descent long wrists?/@comment-34683957-20180715110054

I am not sure but its probably because not alot of ppl bought them, compared to normal rares, meaning there are fewer in game. The rare cone collar for example, was sold in an unusual place and not many ppl might have been aware of it.

Also they are unobtainable, thus making them even more rarer.

Just my two cents on this topic :P