Selling completely new (still in the box, never used). It's a fixie (i.e., fixed gear) fits heights of 5'2'' to 5'5''.

Retails at 299$ https://www.6ku.com/products/6ku-urban-track-bike?variant=11809790853167

Do you want a lightweight track bike that won’t break the bank? Then the 6KU Urban Track is the bike for you. Our Urban Track features a lightweight aluminum frame and fork. This is one purchase you won’t regret.

All 6KU Urban Track bikes include FREE assembly tools. $30 Value of free tools that is all you will need to assemble your new bike!

Lightweight Full Aluminum Frame and Fork
30mm Deep V Double-Walled Alloy Wheels
Ride Fixed Gear or Freewheel with a Flip-Flop Hub
Easy Maintenance and Upkeep
30-Day Hassle-Free Return Policy

It's so new it needs to be assembled, but all tools are in the box and it's very straightforward.