Eight SFP+ ports, completely fanless, and small enough to sit on a shelf. Not a general purpose switch, it exists to tie together 10G links between your NAS, hypervisors and main switch. Silent operation is the entire point, and it manages through the same UniFi controller as the rest of the line.
Across 8 listings tracked in the last three days, the median total cost in USD including shipping is $272, and the lowest is $200. RackSniper flags a listing once it falls at or below 70 percent of the trailing 30 day median, which for this product means roughly $190 or less. Condition and configuration vary widely on used enterprise hardware, so treat the median as a reference point rather than a target.