I bought a demo mower 2 weeks ago from the local dealer. In order for me to use the mower before the demo time was up, I am required to bring the mower back once a week for him to keep on his lot. I don't know wether or not the mower is being used as a demo but, I do know he's mowing his personal yard with it. I took the mower on Wednesday and left it like I always do. While I was there I told him to sharpen the blades. I looked at the blades yesterday when I finished mowing and the don't look like they've been sharpened. So I called this morning to see if they forgot. Dealer said " NO" I sharpened em' and then mowed my place with it, and on top of that one of the blades was bent. I haven't paid him for sharpening the blades yet. So, my dilemma is this: If there was a need for a replacement blade should I have to cover it? I haven't hit anything with it. My brother says he hasn't hit anything with it. I would like to maintain a healthy relationship with him. Any advice???