I used to be an audiophile until recently - cant be bothered now - ipod and some decent headphones are about all I need.
One of the most expensive systems I had:
2 x Krell FPB350M (£13,995 each)
Wilson Watt 'Puppies' (£24,995 a pair)
TAG McLaren DVD32R (£5195)
Absolute bonkers stuff - didnt pay retail as I cheated by being 'in the business' at the time.
other stuff I've owned:
JBL 4333B - £4995 in 1978!
TAG McLaren AV192R (£11,995).
Currently just run an AV32R prototype, Cambridge Audio power amps (not the current stuff - mid 80's), and my faithfull Mission 753 speakers.
I still dabble, sourcing stuff for friends now and again.
Also cars - blew a few mortgages worth on knackered 'classics' over the years...
A bit of DJing at the local pub too
Just realized - I could put a decent hifi system together with stuff made under 20 miles away from my house. Low carbon footprint!