Where did you sink the most cash into?


I'm not interested in how much anyone  spent, but I'm curious what the single most costly item in your system is- ie, amplifier, CD player, etc.

I will go first- in my present set up, it's speakers. 

But I can't live without my ancient Zerostat (the red one) which was probably 1/3 if what they retail for now. My most enduring audio purchase!  
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Ever notice that really good systems are often accompanied by lots of software?   Records, CDs, what have you.   Its usually a pretty good practical indicator of whether things  worked out well or not. 
So much buying selling trading and flipping I have no actual idea what I truly paid for anything. The only piece of my system that I straight out bought would be my dac when my cd player died, I know I spent $1250 on that no clue on anything else. By retail my speakers are by far the most expensive, but again they were obtained via trade.
  Source, amps, cabling, speakers.  Could only guess at the value of the media.