Never seen 24GB DIMMs before... but $35 is cheap for 24GB:
24GB 3Rx4 PC3L-10600R DDR3 RAM Samsung Server Memory RAM 15-12296-01 | eBay
24GB 3Rx4 PC3L-10600R DDR3 RAM Samsung Server Memory RAM 15-12296-01 | eBay
It's not a error. These are 24GB DIMMs. You can look up the part number on Samsung's website.looks like a misprint to me. more like 2GB..lol