Saw this deal. It's back ordered with no ETA, but best price I've seen in a long time.
Crucial Memory CT4K16G4RFD4213 64GB DDR4 2133 ECC Registered 4X16GB Dual Retail
$473.66
Crucial Memory CT4K16G4RFD4213 64GB DDR4 2133 ECC Registered 4X16GB Dual Retail
Crucial Memory CT4K16G4RFD4213 64GB DDR4 2133 ECC Registered 4X16GB Dual Retail
$473.66
Crucial Memory CT4K16G4RFD4213 64GB DDR4 2133 ECC Registered 4X16GB Dual Retail