Ross; It's not "pricey" when compared to the cost of bubble shipping envelopes and the accompaning $1.13 minimum to mail a bubble envelope. I was selling the individual fold-over corrugated self-stick inserts at my cost during the last A.C. meeting on Sunday. Chopek, Pushkin, Weisentein cleaned me out of the supply I brought with me.
Plus, if you cut the corrugated mailer in half for the smaller #6 envelopes ... you've cut your cost by 50%.