There are new coupons here, here, and here for $0.75/1 Chex (which are, of course, gluten free except for the Wheat Chex and Multi-Bran Chex). You can print 2 from each site. Get printing, then wait for a sale! These are VERY high value coupons, which will double to $1 at many grocery stores.
CHEX $0.75/1 COUPON