Purchased brand new, never installed (have the original packaging) from BMW recently, unfortunately I've got a 2009 N54 and these are for the redesigned mirror caps that come in a 2011+ N55. Can't return no receipt...
Paid $700+ for them... Selling for $375 or best offer + shipping. Pretty much 2 for 1.
Bought these at a BMW dealership in Toronto, in the states these are probably cheaper at the dealer. But price is still really good. Will post pictures.