I too got a pretty good buy on 10 mats (2 of each size I use) during the pre-holiday sales. however, they do get old, and I think the mats may tend to crack a bit sooner if they have been around a while. Anyway, I usually get my mats when they have a sale or if I am getting another die or dies, I will fill in with mats to get free shipping. I know I will be using the mats eventually, so I see that as a win.