Yes, when a product on Kit's site is sold out, you will see "product not found."
You have to remember, you're not just competing with ppl here who may want one when a figure is released, but also all the ppl on facebook as well where the announcement is usually shared first. Who knows how many pages/groups that announcement gets shared with when Kit posts that he has a few more of anything in-stock that ends up turning out to be a good looking figure. There's more and more ppl waiting it out these days for in hand pics and gambling on if they will be able to get one of something when released.