So I've had a seller's account on Amazon.com for years. Michelle and I often put up books we're done with or CDs we no longer want. You get an email when someone bought something from you (via the "Used & New" links on each product page) and then you have a couple of days to get it in the mail. Sometimes, after we've done some spring cleaning, that seller account can get up to a few hundred dollars.

Every 4-6 weeks or so, they transfer it to your bank account and send you a nice little summary of the transactions. Then you've got some side money with which to get more books, CDs, or movies... right? So where should you go to spend that money?

Well, what they DON'T offer is an option to just credit your regular Amazon.com account with the money in your seller's account. I don't get that... all they need is to provide a "Convert this balance to an Amazon.com Gift Certificate" option and they'd often get that money right back. Doing that leads to potentially three transactions that make money for Amazon -- My initial purchase of an item, their fee for me selling that item on their site later, and then another purchase using the proceeds from that sale.

I've emailed them about this before (have fun finding an email address on their site), but just got a boilerplate "thanks for your suggestion" response... so, what am I missing?