@genetics1982 wrote:

Why do they charge fees on postage?  

Simple.  If they didn't, people would sell $20 items for $1 plus $19 for postage, and thus avoid fees.

 

Poor eBay, you think they're so dumb they can't work out a system to track reasonable postage costs? 

 

It also protects buyers from only being able to get a $1 refund on an item if they return it