If you feel fairly confident, you can try sending a larger group of cards in soft sleeves taped between a couple of toploaders. It's almost as good, and probably a lot cheaper both on materials and on shipping (Mozz did this once for me, worked pretty well).
Put two in a soft sleeve back to back. Then put them in a top loader. No more then two cards per top loader.
not unless there old and unusable lol i do it all the time or use old poke pre sleeves =]
...and had pubic hair stuck to said stickiness....