I bought an ebay module for enterprise version from a local odoo partner and used on community version of odoo 10. Everything works fine including syn categories and product status as well as list products from odoo to ebay. The only issue I encountered is that for the variant products, the product variant do not corresponding for the imported order from ebay to odoo. For example, if you list a product with two variants, color:( red,green,blue) and size(small, Large) When a customer place an order with color red-small on ebay, the order imported to odoo becomes blue-large in sale order.
Please read the following carefully before you accept the job:
1. I can send you the ebay enterprise module if you do not have it or in case my version is not same with yours.
2. You must have or create your own sandbox account for ebay and paypal for testing. I tested this module on my production environment and can not provide my credentials.(I had difficulty to create the sandbox environment). This is especially important because that is why my provider can not solve this issue for me since he never deal with ebay before.