Used but in nice condition, a Matrix S Drive Performance Treadmill & Sledmill.  Its motor-less.  Cheap shipping within the cont US.  Local pickup preferred but will ship. 

Information from the manufacturer:

Discover the unmatched versatility of the Matrix Fitness S-Drive Performance Trainer to help your athletes elevate their explosiveness and endurance while refining form. Only the S-Drive Performance Trainer gives you everything you get from self-powered treadmills, weighted sleds, resistance parachutes and harness systems in one space-saving footprint.

Features

Sled brake with eight magnetic settings provides a true-to-life weighted sled pushing experience up to 122 kg / 270 lbs.

Parachute brake with 11 settings gives users the feel of real parachute resistance

Sled and parachute brakes can be used individually or together to vary between cardio and strength-building workouts

Magnetic brake systems provide repeatable resistance ideal for athletic progression programs

Easily adjustable harness allows for a complete upper body range of movement and stores conveniently out of the way when not in use

Built-in bar simulates sled pushing and pulling without needing the space to use a traditional sled

7-degree incline maintains natural sprint mechanics while reducing starting effort

Full perimeter handrails offer easy entry and exit and support during lateral movement

Low-inertia design with a true zero start speed and unlimited top speed offers true-to-life ground reaction force and quick deceleration, ideal for high-intensity interval training

Lubrication-free, low-friction belt and heavy-duty deck design stands up to the most intense workouts

Self-powered design makes it easy to place the unit anywhere in your facility

17.8 cm / 7” step-on height offers easy access for all users