Round robins sound good but this has been my experience with them. I have spent hundreds of dollars during the past 3 years on round robins on postage sending out cards. 90% of the cards I receive I already have and just go out to somebody else on the round robin list. So I find it to be a very expensive way of adding some cards to my collection. Other collectors I have been in contact with feel the same way and agree with me. If you are a brand new collector with no cards to start with it might be okay but then you would have no cards to send anybody. I think round robins suck for this reason.