I believe e-bay is for adults to spend their money as they wish. Not all buyers are collectors and not all collectors must have an original dial. Not all sellers are very educated as to originality of the dial either.
It is possible this seller did not know and therefore did not address this issue in their auction. Auctions are typically run over the period of 7 to 10 days. Plenty of time to ask the seller any questions important to one or ask others for an opinion. I came upon your post just by chance. To me it was totally unimportant if this watch had original dial or not. I was not about to buy it. If a watch like this was presented to me in person and the price was right I would buy it. The dial was very presentable.
The originality of the dial is not a deal killer for me. I enjoy vintage watches for more than just their dials.
There are over 250,000 watches offered on e-bay at any given time. Surely most watches are not offered to collectors? Any seller is free to offer anything they have for sale with as little or as much information as they have or are willing to share. It is up to the buyer to ask for more or pass it by. E-bay is a Bazaar with good and some not so good sellers. Buyer beware.