I have a used Raritan PDU DPXS20A-20L6 20-Outlets 208-240V / 20A / L6-20P / outlet-level metering for sale:
It has billing-grade accuracy in measuring power draw, +/-1%.
Works well although there are some external scratches that doesn't affect the performance of the PDU. I'll post photos of it when I get the chance later this week. Buyer is responsible for actual shipping costs and will ship from CA, ZIP 90095.
I'll consider *reasonable* offers/bids only. Thank you.