I have two pair of with the arms that bolt to the doors, Power and all new. $25 per pair.
Then I have 3 (one pair and one additional one) that are on extendable arms these are also new, and power. $40.
I purchased all this stuff to make use of on a task that I never ever did. I am uncertain of what there application is. would be terrific for a box truck or any tow rig.