Nah, unless it seems like there should be a return. For me, I spend roughtly 10 minutes and a buck a player on average. I did take a full day over winter break putting each players first card into a spread sheet, and then noting if they sign through the mail, with/without a fee, etc. But I did that while listening to records and I enjoyed the process of it. I have a pretty good system down now so it's really not too big of a deal. The hardest part is getting the cards, but I know a dealer that has dug up cards for me a few times and enjoys helping me out since he knows about my project. To answer your question, I've resent a few, but really it's a buck lost if I don't get a return. For all the returns I have got back it more than evens out. Most of these guys cards are being sold for 3-5 bucks each plus shipping on eBay. I've mailed to about 127 players (maybe more, I've got cards back that I never logged and added em in) and have received back 87. Some with multiple cards. There's about 20 that are included in that 127 I just mailed out, and another 10-12 that I mailed out in mid January. So that leaves me around 20 that are not returned. (With 4-5 players having their cards sitting at minor league stadiums somewhere waiting for the new season to start). All in all it's a pretty good turnout. If I have doubles of guys, I send em and they've been signed. Hoping somewhere down the road I can use em as trade material. I'm not listing em on eBay unless I do it as a huge lot. In the end, I'm okay losing 20 bucks if I know that had I tried to do this project on eBay or through card shops it woulda cost me $500 or more already. I know BrewersSuperCollector is a little more specific because he's sending OMLB balls, and those run 14 a pop and shipping is gonna be much more. I'm willing to chance it a bit more on "sometimes" type returns (ie Rob Deer, Felipe Alou, etc)