Wow. I looked at the price of the boards now. A package of 100 thick, hard to bend, acid free, large comic size board for $4.99 at a tech/comic store in 2018. I have the package with price on it with a few boards left. Now they are smaller in size and overpriced. I think I'll buy thick white cardstock by the ream. I don't care about acid free. My fabric goal is not for museum donation.