I have a dual core server of this era. It effectively runs at 1/10th the performance of my modern gaming machine, while consuming 2-3x as much electricity. Not to mention HVAC costs and the noise it generates.
Maybe by underclocking this thing and by virtue of not trying to run a beehive of tiny fans, this is viable (doubtful), but the operating costs will no doubt quickly negate the price compared to a modest AMD-based mini PC, that is faster and quieter, and uses 35-65W.
I hated my experiment with used server equipment, and I assume whoever buys this will as well.