You have 2 purples that tolerate each other? If that is the case then I would say that they are worth a whole lot more than your normal fat and happy 4" purple tang. I have a 4" and he is my favorite fish. Love it when he swims side by side with a similiar sized Yellow Tang. Too bad yellow tangs don't have purple tail and purple pectoral fins(negative of the purple).

I gave 85 for my purple 3.5" a year or so ago.

Bill