I have a few Harris bipods for sale. They are all brand new, in the packaging. These are the latest versions with the large knobs, keeping you from spending an extra $10 to get the Tanks knob.
I've only one variety, and it's the version that goes from 13" to 23". It does not articulate.
Price is $50 each, and I'll even cover the shipping. If you want to use Paypal, I'll even cover those fees!