Program for selling on eBay?

Hello all!  Curious what the program is to be able to use the drop down menu for selling Lego parts on Ebay. Not sure how many different pieces it has available, but the one I'm referring to is for a standard 2x4 brick. In the listing, you can use the drop down menu to select colors and another drop down menu for the amounts(might be sold in amounts of 5 or 10 or 25, etc.).

Not sure if its on the Ebay side or an outside program. Also, if anyone knows, do you have to use your own picture or is one supplied to match the color chosen by the buyer?

Any help would be appreciated for either the program mentioned above or an easier way to list individual pieces on Ebay without having to create your own database(to prevent having to take multiple pictures of items sold in the past. The process is pretty simple on Bricklink for pieces, but Ebay is a different monster since they are not limited to Lego only.

Again, any help would be greatly appreciated! Thanks in advance!!