FlyCam 3000 for video stabilization

I bought this for my son in film school, only to learn he already has one (this mama tried). I don’t know much about them but found a description online below. Please feel free to ask any questions and/or make an offer. I think new price is around $150-$175.

Providing pan, tilt, and roll stabilization around a central handle, the FLYCAM 3000 allows you to achieve smooth-moving cinematic shots when following a subject. It keeps the camera horizontally balanced as you walk, run, climb stairs, and otherwise move about. A special feature the FLYCAM 3000 offers that most other FLYCAM stabilizers don't is a sliding camera platform with a drop-in quick release camera plate. While other stabilizers allow you to counterbalance the camera load with counterweights and height adjustment, the FLYCAM 3000 offers both of these plus the sliding quick release system.

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