Old Navy coupon $20 off maternity clothes
Maternity layering tees are $5 (orig. $12), cuter tops are $8-$10 (orig $12.50), zip hoodies are $15 (orig. $19.50), and low rise cargo pants and shorts are $15 (orig. $22-$26.50). Seems like these are awfully good prices for clothes you are only going to wear for a few months. Of course, hand me downs are even cheaper.
Caveats: only valid on maternity clothes.