The eBay module for PrestaShop enables you to:
1. Create eBay listings from your PrestaShop product catalogue.
2. Synchronise available product titles, descriptions, quantities, etc. across PrestaShop and eBay.
3. Create orders in PrestaShop when sales occur on eBay.
The general work flow is as follows:
1. You create listings on eBay based on your webshop products.
2. Buyers buy products from those eBay-listings and pay with PayPal.
3. Orders are then copied to the PrestaShop back office and stock levels are kept in sync across sales channels.