Hi,
I have one small store close to me, they do have good meat sales once in a while and they also double coupons up to .50 every so often but like was said they are highly over priced on most items, even if doubling unless they happen to be running an item on sale that week. This is the web site for my area, some of these stores do double regularly but I am not sure of the amount or minimums if any,....
http://www.onlinegrocer.com