The HTC 10 went into the "old but gold" category after the U11 came out. It's still a capable smartphone with a great camera and its Snapdragon 820 chipset still has plenty of oomph. Plus, it's last call for those wanting a metal HTC, the company switched away to glass for the U-series. There's an offer on eBay for 290 while HTC's official site sells it at 480. There's a catch, of course. The item condition is "new, unused", but this looks like an open box unit. Also, be warned some people have complained that they have received demo units from B-Ware deals (like this one). HTC...
Source: http://www.gsmarena.com/htc_10_goes_for__euro290_on_ebay_germany-news-26783.php