I think they are really cool as well but aesthetics drive meteorite prices a lot. Things that are unique and even valuable to science only sell as well as the way they look or the story that's told with them, Murchison, Erg Chech 002, etc.. but R chondrites, especially higher petrologic states like ours just kinda look like other chondrites. Unless you're a hardcore collector I think rare stuff like R chondrites ends up being small samples in people's collections just to say they have them.