At my local Walgreens I noticed they have all the summer clothes marked 75% off. They have lots of random things, shoes, shirts, shorts, in all sizes, but a pretty good selection. I saw they had lots of long sleeve shirts that were marked 75% off as well.
$1.99 for a new mens shirt, is a pretty good price I thought. These would make a good filler item if you are using Register Rewards.
You may look to see what your store has.