I have one I'm debating on selling. I've only used it 3 times but have had it for a year now. If I sell it, I'd be looking for around $200. It's the Pro version, not the HD. But only really difference that I notice was the counter weights
From what I've researched the difference between the Pro and HD are pretty apparent. The mounting plate on the HD is what makes it superior to the Pro, from what I've read.