Out of warranty at work therefore into my basement at home - eviltoast

These were originally built as a VSAN which I plan on replicating once I build a proper home vSphere environment. Each of the 740s have about 12TB raw in them but I’d like to load the 8 empty bays in each, anyone know where I can get a stack of cheap/used 1.8TB 2.5" SAS drives? I care more about capacity compared to speed as I plan on making the 440 a standalone all flash host.