General Knoppix support for those who've read the FAQ at the Wiki
Micron 16GB DDR4-2400 SODIMM MTA16ATF2G64HZ-2G3E1 Laptop Memory RAM
$21.99
Micron 8GB DDR4 1Rx16 PC4-3200AA Laptop RAM Memory MTA4ATF1G64HZ-3G2E2
$10.00
A-Tech 8GB DDR3 1600 PC3-12800 Laptop SODIMM 204-Pin Memory RAM PC3L DDR3L 1x 8G
$13.99
Crucial DDR3L 16GB 1600 2x 8GB PC3-12800 Laptop SODIMM Memory RAM PC3 16G DDR3
$22.45
Crucial 8GB SO-DIMM PC3-12800 (DDR3-1600) Memory
$9.49
CORSAIR - VENGEANCE LPX 32GB (2x16GB) 3200MHz DDR4 C16 DIMM Desktop Memory
$59.99
(191) Mixed brand memory 4GB, 8 GB, 16 GB 30 day warranty
$600.00
Samsung 16GB 2Rx4 PC4-2400 RDIMM DDR4-19200 ECC REG Registered Server Memory RAM
$20.99
Set Of 10 Samsung (1 x 8GB) PC4-21300 So DIMM So(DDR4-2666) Memory - SET OF 10
$100.00
A-Tech 64GB 2x 32GB 2Rx4 PC4-23400R DDR4 2933MHz ECC REG RDIMM Server Memory RAM
$109.98