Just thinking back, I spent £2 on my first car on a second hand pair of spacers, nothing then till my 4th car in 1971 when I bought a set of gauges, about £25 from memory.  So £27 over 40 years then about £5k on The Zed  . 
  EDIT, Almost forgot about the sun visors I bought for my Ausin Healey Sprite (can you believe they weren't fitted as standard or even as an option) !!  
  
Pete