Like new KneeRover - husband only used it upstairs (indoors) for a few weeks and then didn't need it. Great for anyone with a broken leg, ankle, foot, etc. Makes it easy to keep weight off and still be able to get around.
Can be found/bought on Amazon for $115. This is already assembled so that's a time saver as well. Comes with a free basket which you can detach but makes carrying things around a little easier. https://www.amazon.com/KneeRover-Economy-Steerable-Alternative-Metallic/dp/B0794WFT5B/