Here's an ebay link Micron 16GB PC3L 10600R DDR3 ECC SODIMM Reg MT36KSS2G72RHZ 1G6E1 not Laptop RAM | eBay - 30 available $45/ ea.
The auction says "reg" but I think this is the right datasheet: https://www.micron.com/~/media/documents/products/data-sheet/modules/sordimm/kss36c2gx72rhz.pdf and I think these are actually not REG and maybe just someone that doesn't know that you can have unbuffered ECC.
That would mean 64GB of RAM for the C2750's for $180!
The auction says "reg" but I think this is the right datasheet: https://www.micron.com/~/media/documents/products/data-sheet/modules/sordimm/kss36c2gx72rhz.pdf and I think these are actually not REG and maybe just someone that doesn't know that you can have unbuffered ECC.
That would mean 64GB of RAM for the C2750's for $180!