Amazon usually carries the mats and some of the dies - the prices are about what you see on Accuquilt (and sometimes are shipped from Accuquilt).
When using my mats, I flip them, move them a bit so I do not always cut in the same place, and have the mat a bit off of straight so I can prolong the life. I have the GO Big because of hand and arm issues and have been able to really use the mats a long time.