Have you tried doubling cards up in the anti-static bags? That's what I usually do when I run out of bags... If you still have card left over, I'd take blobrana's advice and stick them in a cardboard box... I have two boxes worth of old PC ISA/VL-Bus cards from my early 486/Pentium days. Most of the cards worked the last time I tried them (of course that was something like 5-7 years ago).
