While I agree that anyone buying an electric bike on eBay, sight unseen (apart from the photos) should conform to buyer beware advice, it is not sensible to manufacture doubts in the face of the evidence: bike complete with charger, battery, and documentation, therefore not stolen; bike complete with an apparently authentic history, and illustrated with photos which tend to corroborate rather than muddy that history.
I know it is possible to clean up a bike prior to sale, and if it has not been used much, restore it to apparently new-looking condition, but there will still be blemishes, and while the side walls of the tyres might be cleaned, how do you restore the pristine tread, or the mark free rims (other than by using Photoshop for the photos)? And anyone who has tried to weigh an electric bike (as I have using a spring balance, or tipping it end up on the bathroom scales) will know that it is not easy to arrive at an accurate weight.
And remember, if all else fails, resort can be had to the eBay and Paypal resolution procedures for a refund if the seller's description is shown to be really unsound.