You're looking at about 600 for that. 750 is definitely too much.
I saw someone say a 2x8GB set of my ram is 300 alone and i have 4x16gb lol, but im definitely willing to sell at 600 because i have bills due like today so if you know anyone....
Why take their word for it when you can check here for free: https://pcpartpicker.com/product/sykwrH/gskill-memory-f43200c16d16gtzb
$180 for 2x8GB. So, you're looking at about $600-650 depending on what a buyer is willing to pay for used.