Choose to learn eBay from a successful seller.
The sheer volume and diversity of eBay's site makes the number of trading rules and their various subtle distinctions almost impossible to learn from a theoretical position.
A seller who is familiar with the work arounds, will save you valuable time, money and frustration.
eBay is a wonderful venue with limitless opportunity for the versatile.
For anyone willing to make executive decisions, accept an overall gain without dwelling on individual disappointments, then the sky is the limit.
Where to look.
Firstly, look at the teachers eBay feedback to ascertain they are selling regularly on the site.
Do not be guided by the price the teacher is charging, be guided by their selling experience and the length of time they have traded on the site.