Did you keep the Tool kit that came with the car?
I kept the newish rubber car mats when I sold my Civic and left the well used originals. Saved me £25 buying a new set for my replacement car.
I also did keep a spare front door key to my old student house.![]()
I also switched out the H7 rally racing bulbs with a blue-ish tinge for some tea-lights, serves the new owner right I say.