This model doesn’t have 10GbE, but you can easily add it. Seems to have a lot of expansion for a 2U. Some guy made a JDM style video on it 2 years ago.
Condition: Used, Tested Working. Does not include rails
There are a couple threads on STH about the Quanta S210: v1 only, BIOS+BMC are slow and flaky, fans idle at 50%. V2 support by replacing the BIOS chip with a larger one. One guy bricked his board with a bad BIOS update. The backplane is 1:1. The board (SSI-EEB) without chassis has been as low as $60 before.