Overland Vehicle Systems Discovery Rack. Retails new for around $1,395.

This fits mid-size short-bed trucks: Tacoma, Chevrolet Colorado, Nissan Frontier, and similar. Note it does NOT fit Ford Ranger or Maverick.
Measurements:

59.25" long
22" high
Crossbars: 51" long, width adjusts to fit your bed

No-drill install, bolts straight to your factory bed rails. Steel construction, black powder coat; side panels have MOLLE mounting holes for gas cans, tools, recovery gear. Rated for 1350 lbs static weight capacity, so it'll carry a rooftop tent no problem.

Good condition, no rust. All hardware included.

Asking $1100. Local pickup only, cash or Venmo.