Hi,
Short and to the point:
1) Are sales higher on average with shipping included in the price Quote : "Free Shipping"
2) Are sales higher on average with low item price and shipping additional.
3) For Ebay sales are generally higher with shipping included, but that raises the fee Ebay receives.
4) Start a Best Practices blog/thread/or help menu that helps new ebid sellers be successful and therefore helps build your site desirability up for sellers and buyers.
Thank you for viewing.
Tom
dreamdv2 ID