also check on ebay. i bought a pack of 8 omnigrid rulers for under $15.00. but the thing is to shop around on prices (and sources online or not) and use coupons whenever possible. you will find just what you need for a price that works for you. good luck with your shopping.

JoAnn's is probably the best place, (with the coupons) to get these. Some great deals.

depends, joann's with coupons is good, but ebay also has awesome prices that sometimes beat joanns', I got all my gingher products on ebay and my 60mm quick change olfa cutter, one of my faves after my 45mm gingher

I ALWAYS buy with coupons or on sale...doesnt matter to me where...I prefer Olfa brand cutters and Omni grid mats. If I know I am gonna need a new one within the year I make sure to watch the sales...My oldest Olfa cutter had a broken spring and someone here on the board told us about Olfas great customer service, I contacted them as to the problem and they sent me 3 of the little springs...Free

WAWAK has become my new go to store - I'm not in any way affiliated. They carry Olfa rotary cutters but not the omnigrid mats. Their prices are often better than the 50% off at JoAnns. http://www.wawak.com/products/category.cfm?cID=1222