Not a fan of these prices as well but people selling them on eBay would probably be one of the main reasons of the price skyrocketing.
I thought I would upload some pics here that will display similar caps that will show UV damage as well as the different styles clack makes his skulls with that I recently noticed.

UV damage/yellowing is quite noticable on the tris on the top row. The OG (MX) seems to have the most UV damage as the face is a lot more yellowed which is then followed by the Salute (MX). The OG (Topre) was very well taken care of and it is actually still quite white.
Some of the skulls have some varying thickness. Candycorn + enviro seems to have a much thinner face in comparison to the other older tris however I have seen some older skulls with thin skulls also so perhaps he could put either a thin or a thicker face on the skulls as he pleases. I noticed that my candycorns do look quite different on the yellow part though the orange is almost exactly the same so i assume they might have been made in different batches.
