Can anyone recommend me a cheap ish running treadmill that's decent quality and will easily store flat. I don't have a lot of room so it would be stored behind a door or under a bed. I don't mind if it's just the running pad and doesn't have a handle or any fancy display. It's basically for keeping fit when I can't get outside. I'm not a good runner or very fast. There seems to be too much choice and I can't get my head around what would be best for my needs.