I'm not sure what they charge because it varies by amount so for me, small amounts are negligible and only affect me when you get up into the bigger sales. You can look up the calculations right before you list your product and adjust your price...
15% commission to eBay. Apart from one item I had to accept back and pay return shipping $18 (because the stupid buyer could not replace two AA cells which dislodged during transit). I sold everything to super happy buyers because of my low...