Do you mind posting which seller you purchased from? I checked sold listings and didn't see any that close to your price point or that show were sold less than list or had offers. Did the seller accept a Best Offer?
I got it from seller ocean-tech. I did best offer and was able to get it for $50, shipping free.
It came with two optional boards: a tyan-branded sas2 controller (giving an additional 2x SFF-8088 to the built-in 2x SFF-8088) and a mellanox cx4 40Gb 1xSPF connection. there are a total of 6xmini-sas3/SFF-8643 ports built-in, all labeled as PCIe_SSD1,2,4,5,6,7. There's also a TPM module installed.
Between all these SAS ports and the two 10GBe NICs, this would make a killer NAS mobo for a little over $100 (I have 2xE5 -2680 v4's and 128GB of ECC DDR4 I paid about another $50 total for).
Unfortunately I'm stuck at the boot screen as reported above and haven't been able to find the "disable BMC" jumper
@Fritz was talking about.