Ebay allow this.
When you sell on the site, you tacitly agree to everything in the user agreement, including allowing other members to use your images.
What should I do if my image, video or text is being used by another seller?
When you create listings you give eBay and its customers permission, through our User Agreement, to use your images, videos and product details. Your content may be added to the eBay product catalogue, and may be used by other sellers in their eBay listings.
The policy is here:
https://www.ebay.co.uk/help/policies/listing-policies/images-videos-text-policy?id=4240&st=3&pos=1&q...
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)
