If I ever sell anything on eBay, I always do it through the mobile app because I've found the mobile app - even with the slower text entry - is so much faster to use. The regular web interface is utterly terrible.
Just a thought, btw (not sure if you're already doing this, haven't tried to sell anything with you) - have you considered using a webcam plugin so people can add pictures for items via webcam?
Both eBay and PayPal have such horrible, slow websites which are begging to be innovated against. I hope you do well :-)