Apple 27-inch iMac with Retina 5K display (2017) review: All-in
How to upgrade RAM in the (Mid 2017) 5K iMac and save up to ~$900 [Video] - 9to5Mac
Apple iMac (27-inch, 2017) review: Apple doesn't mess with success - CNET
Amazon.com: OWC 32GB (2 x 16GB) PC19200 DDR4 2400MHz SO-DIMMs Memory Compatible with Mac Mini (Late 2018), 27" and 21.5" iMac (Mid 2017), and Compatible PCs (OWC2400DDR4S32P) : Everything Else
Apple iMac 27-Inch with 5K Display Review (2017): Serious Power | Tom's Guide
Apple iMac 5K 27-inch (2017) review - All you need to know in two minutes - YouTube
Apple iMac 27" 2017 Retina 5K 4.2GHz i7 500GB SSD 8GB RAM Radeon Pro 575 4GB #5 656729567951 | eBay
Apple 27" iMac with Retina 5K Display (Mid 2017) Z0TR-MNED43-BH