I buy lots off of ebay. I would rather trade AUTHENTIC Disney pins with people and CMs than propins/sedesma. I despise those pins. You can get pins off of ebay in lots for the same price that are much better quality and you won't feel embarassed trading them. There are lots of lots that sell for $3 or less a pin. I've been on a pin buying frenzy lately and have gotten quite a few high quality lots for less than $3 a pin shipped!
BTW, I know some people don't mind trading them but I personally prefer not to trade them. I wouldn't want to receive one so I don't give them!