We broke up, things were sold out, here we come to inquire

An office worker, at the time I thought she was Bai Yueguang. When we were together, I bought almost everything she used, and it took a lot of time and effort anyway, especially the computer, which I didn't understand before, and I put some effort into it. Later, she seamlessly joined a group. He also kept lying to me that they didn't talk during the day, and they weren't together at night. To be honest, I care about these, but I don't care that much. Until yesterday, she discovered that her boyfriend came to our office to use her computer. I went to the lab and told her to save the data. I have to remove all the mouse, keyboard, secondary screen, memory stick, hard drive, etc., and I threw away many things that I gave her later. I know that I am very low, but I just feel sorry for my humble and worthless sincerity. I didn't move those things behind. I don't want to use the same thing as her. So prepare to sell your current set. I would like to ask, value friends, how much can you sell for a 14-month keyboard and mouse set? There is also a Casio Black Warrior. At that time, she had a white one. I bought the black one and planned to sell it. How much is it worth? 

Microsoft