The pricing differential is just absurd now. I expanded the memory on my math clusters about 2 years ago so I would have 4 machines with 1.5TB of DDR4 memory each. Back then a 128GB DDR4 DIMM could be found for $150 used. Now those same DIMMs are $600-$800 used! I think the RAM in my homelab is worth more than all of the other hardware combined.