It is 2 or 300 too much. If the eBay listing I posted is where OP bought the watch from, he purchased from a mass relisting bot that doubles the price.
I believe this is the original source of the watch:
https://page.auctions.yahoo.co.jp/jp/auction/c1117152311
Someone bought the watch in Japan in January and then relisted it on Mercari (link no longer works, but was from
https://jp.mercari.com/en/item/m59423625134 ), and that is where the eBay bot reseller purchased it to ship to OP.
Was sold on Mercari for ¥44,200 (~$287 based on today's exchange rate), and according to the description, has a "non-genuine bracelet".
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