Quick Ship Electronics via eBay offers the refurbished Samsung 28" 4K Ultra 2160p LED-Backlit LCD Monitor, model no. U28D590D, for $329.99 with free shipping. That's $45 under our mention from last month and tied as the best price we've seen. (It's also $130 under the best price we could find for a refurb and $170 under the lowest for a new one.) It features a 3840x2160 native resolution (four times that of 1080p), LED backlight, two HDMI ports, and DisplayPort. A 1-year Quick Ship Electronics warranty applies.