I have three pieces that I can't imagine parting with:-
1. My first dream bass, a 1980 natural Stingray bought with my first student grant check in 1981 from Peter Cookes, Acton.
2. My 1993 Thumb NT bought from Coda Music, Luton in 1990ish. I chopped in at least 6 basses to reach the near £1k price tag.
3. My Hartke AH3500 head, bought from a pro bassist living in Holmfirth in the mid 90s. I'd seen a bassist playing a Thumb through a Hartke rig in a Sudbury (Suffolk) pub and knew that was the sound I wanted. It's probably only worth about £100, but it served me so well for 10 years that I just can't let it go. It's the superior (IMO) MOSFET, Transient Attack version.