Very calm British Shorthair cat used to apartment living

Okay, so to be honest, this cat has always lived peacefully in my apartment and is really easy to live with. Most of the time he sleeps by the window or on the sofa, watching the neighborhood go by as if he's keeping an eye on things. He's not the type to run around or break things. Sometimes in the evening he comes and sits next to me while I watch TV. He eats his kibble calmly and uses the litter box without any problems. Unfortunately, I have to give him away because I'm going to work in another city for a long time and I can't take him with me. I would really like him to find someone calm who likes easygoing cats.