Posted By:
Lee BehrensJay and I do quite a bit a mailing and use the services that ebay/paypal offer. If you use there postage service the delivery confirmation is only .35 and it prints your label up so you don't have to stand in line at the post office. (you do have to wiegh your package). All delivery confirmation envelopes have to be 3/4 inch thick, this i solve by either sticking a couple of packing peanuts or wrapping the card in the rigid holder once with bubble wrap.
This works best for us, and saves us money on delivery confirmation (which paypal requires if you ever have a dispute or you are screwed).
Lee