Here are all the RAM deals we found that are worth considering this Cyber Monday. Also worth noting that it's better to get a larger single kit than two smaller kits for the same total capacity. This is because kits are binned from manufacturers to guarantee same timings.
Crucial Ballistix Sport LT 16GB (single stick) DDR4 2400: $77, Amazon (save $20)
G.Skill Aegis 32GB (2x16GB) DDR4 2133: $140, Newegg. This is a great kit from G.Skill and 32GB we think is a great sweet spot for any new gaming rig. Also makes for a great upgrade if you're moving beyond 16GB.
G.Skill TridentZ Series 16GB (2x8GB) DDR4-3200: $90, Newegg
G.Skill Ripjaws 4 Series 16GB (2x8GB) DDR4 3000: $80, Newegg
G.Skill Ripjaws V Series 16GB (2x8GB) DDR4 2400: $75, Newegg
HyperX Fury 16GB (2x8GB) DDR4 2400: $92, Newegg
HyperX Fury 8GB (2x4GB) DDR4 2400: $51, Newegg
Patriot Viper 4 16GB (2x8GB) DDR4 2800: $93, Newegg
[ Updating! ]