One advice for selling is an option to use paypal shipping. It's not easy to find through the paypal site.
http://www.ebay.com/gds/Secret-PayPa...7215096/g.html
The link to ship is about half way down the page above.
I use it all the time for shipping items I have sold through Net54. And it even lets you get the confirmation for free.
Easily have used it 25-30 times in the last year.