Up until now I've only mailed 10 UPCs at a time to Cactus, so putting a SASE inside an envelope with the UPCs was no problem. Now I've got 30 I want to mail off, and I'm not sure of the best way to handle this. I heard once that you could contact Rob to find out how much return shipping would be, and just send a check along with the UPCs. Is this true? And would I still need to send an envelope for the packs to be mailed in, or would that be included in the shipping cost?