Provatage has HPE Proliant ML30 Gen10 E-2124 Quad-Core 16GB for $280, seems like a good deal.
PROVANTAGE: HPE P06785-S01 HPE Proliant ML30 Gen10 E-2124 Quad-Core 16GB 4LFF S100i 350W 1-Year
PROVANTAGE: HPE P06785-S01 HPE Proliant ML30 Gen10 E-2124 Quad-Core 16GB 4LFF S100i 350W 1-Year