For its members only, Costco offers the TCL 65" 4K HDR Flat LED Ultra HD Roku Smart TV, model no. 65S517, for $599.99 with free shipping. That's $89 under our mention from six days ago and the lowest price we've seen. (It's a low now by $23, although most charge $749 or more.) Features include:
  • 3840x2160 (4K) native resolution
  • HDR with Dolby Vision
  • 802.11ac wireless w/ built-in Roku TV (with access to Netflix, Amazon Instant Video, Hulu Plus, more)
  • Ethernet, USB, & 3 HDMI inputs