This past week, I had several exchanges with an electronics seller on ebay, satisfyelectronics (1.2 million sold). I got a battery fuel gauge from him with absolutely no datasheet for his device, not the chip per se. He responded that ebay wouldn't allow sellers to attach links and asked for my email. Sounded suspicious, but like a fool and considering his sales number, I gave it to him. He sent me a link to another site that supposedly had the schematic of the board and a code to access his store. That site not only wanted my email, but my email password. I finally saw the light and bailed. I've had two "here's your invoice" and one "confirm your flights" phishing emails since then. Those might not be related, bur its suspicious.
I haven't used ebay much in the past few years, but most of my experience, e.g., with stepperonline and American sellers, has been good.