You CAN sell used diapers on ebay now (either they've changed their rules or relaxed them because there are always several listings there. But another website that you can try listing things is Spot's Corner on Hyenacart.com (
http://hyenacart.com/stores/Spots_corner/) Hyenacart is a lot like Etsy (small shops that use paypal for transactions) but most of them are more eco-friendly in their products. I believe for Spot's Corner listings you just pay a set fee and list as many items as you want for a specific period of time (I think it's 2 weeks, but I'm not sure). If someone buys your item, they pay you and you mail it out to them.
However, it really might be easier to work something out with the midwife as then you wouldn't have to mess with shipping them. As an aside, and forgive me if I'm being nosy, but did you have a homebirth? We did with my last and I LOVED it, so that's why I was curious....please don't feel you have to answer if I you don't want to.
And yes, I do have a pair of snap pliers. I ordered mine online because I bought them before they started selling the Babyville line at JoAnns and Hobby Lobby. But from the other ladies on the cloth diaper sewing board I am on, I know that the actual snap pliers in the Babyville line are the same as the ones I have. The babyville snaps are just OK. They work fine, but they are a little cheaper in quality-they are more apt to break while you are setting them if you don't get them lined up the right way in the pliers, and they are also more expensive than the snaps I get from kamsnaps.com (more colors too!)
Sunshine