No eBay in Barbados.
However, if you want to sell on eBay.com USA or any eBay world site, you can. For ebay.com USA, you would have to use the generic Flat Rate shipping options "Shipping from outside the USA" as you domestic shipping option and generic "Standard International Shipping" for the rest of the world.
Each of these has three options, economy, standard and expedited with different estimated dates. These are not shipping option with your post office options, you need to match your local Barbados shipping options to the generic options based on delivery time estimates your post office has and add the cost you need to charge.
