I have 3 Surfaces. One a Surface Pro 7 i5/128gb/8gb and two Surface Books i5/128/8gb which I want to sell towards a Surface Laptop Studio. I would prefer to sell them in a bundle to make things easier. What do you think a good asking price would be. One of the Surface Books has Microsoft complete extended warranty until 2025 and the Surface Pro 7 has extended warranty until April of this year. All are in perfect condition, and I have attached the battery life in the photo. Much Appreciated!