This is a brand new (has never been ridden) Selle Italia Novus Boost Evo Superflow, Pressure Relief Cut-Out Seat. I just took it off a 3T Primo Bike that I purchased. Following is their description:
The Novus Boost Evo saddle combines high performance with a strong focus on comfort together with its waved shape, it helps offer greater support to ischial bones.
Superflow central cutout to better release pressure from the perineal area and increase the feeling of comfort
Waved shape to help give greater stability in the saddle and better support to the ischial bones, even for long periods of time
255g in weight; 145x245 mm saddle dimensions
Light and flexible manganese alloy tube saddle rails
This seat (on-line) cost a minimum of $110.00 + Tax & Shipping. So I think $55.00 is a very fair price. I would be willing to ship for a small charge.