I got a clarification on the forum rules, so I can openly let you in on where I source my feeders from. I've started using http://www.rodentpro.com/index.asp Really good service and a lot cheaper than my local store. $1.25/per 30g-44g weaned rat as opposed to the $3.75 I had been paying. Huge savings now that I am up to 7 snakes. Local shop is $13.50 for large rats, 175g-275g. $2 here. Mediums are $1.75. The trick is to optimize the shipping. It's flat rate so stuff the box as full as you can. Hope that helps you.
Dave