For reference, your coin is similar to this one in the catalogue, though there are significant differences of style. Others with more expertise on that part of the numismatic world will be able to help you more...
I am afraid this is a goldplated replica.
The details are too crude to be good.
You should compare the weight (exactly) and the dimansions.
There are some test to make sure it is solid gold
The style of the bust is more like this: https://en.numista.com/catalogue/pieces91456.html
For goldplating some different layers of metal are put on the metal, before the gold is applied.
It makes the details deform or dissapear
Non est totum quod splendet ut aurum
Rijkdom bestaat niet uit het hebben van veel bezittingen, maar in het hebben van weinig behoeften
is exactly the same coin that jlin496 is asking about.
I looked in my old Friedberg, Gold Coins of the World, 4th ed (1976) where he doesn't list this coin, but says that many "gold coins" are just impressions from silver dies, as this one appears to be. So, PetrusAscanus is right to link to this silver coin. So, the eBay seller is honest in saying "fantasy". I don't think I would pay $780 for a fantasy, though.
EDIT: It looks like the original asking price was $1800, but the seller accepted an offer of $780:
Some of those coins were actually struck in gold long time ago with the dies for the silver coins ─ well before the current Chinese counterfeit industry. The one you have may well belong to that period if, as the weight suggests, it is made of gold. I don't know whether it could possibly be a lead core plated with gold. As PetrusAscanus pointed out, the details are crude, but the coin is also worn and perhaps it is a weak strike as well.
"The Szechuan Rupee had on its obverse the half-length portrait of Emperor Kuang Hsu. It may be the earliest coin that carried the portrait of an emperor in China. [SCOWC (page 1709) stated that similar crown size pieces struck in silver and gold are fantasies. Refer to Unusual World Coins, 2nd edition.] "
Dec. 28 