By default, when listing items into eBay via Selro, images are hosted within Selro.
You can add up to 16 images and can display these images within your eBay HTML template. As there is no additional charge for image hosting within Selro, this is the cheapest way to add more images into your eBay items. However, with this option, eBay will show one image on the top-left next to the title and all the other images can be shown in the item's HTML description section (using tags from Selro).
If you use eBay's picture service, you can display up to 12 images and all of these will appear next to the item title main image section. Depending on the category that you are selling, an additional eBay listing fee may apply.
You can enable the eBay Picture service for your eBay items listing via Selro by going into your eBay listing template under Settings -> Listing Templates. The flag is under Listing Features section.