90% sure it's fine.
So long as you list in the product description that you are in fact sending them scanned images of the items, instead of the physical item. People sell ebooks on ebay. Same thing, so long as you mention it's a digital item.
What eBay does not like, is an item you can't prove the origin of, .e.g a Snowball from Texas, or a jar of air from Manhattan. (Those items could once be found on eBay before they changed their policy.)
I would be sure to include a guarantee that the keys for the items you are selling will work, or someone will think it's a scam.