Many of us purchase equipment that is, strictly speaking, beyond our means. But if you pay a fair used price for a piece that is likely to hold it's value, your ultimate cost may be quite low. For example, I paid $1800 for my ($3000 retail) Cary SLI-80 used several years ago, and could probably still get $1600 for it. I did spend $100 on EL34 output tubes, just for fun. On the other hand I paid $2700 for used Silverline Sonatina II speakers ($4500 new retail), which I love, but now could probably get only $1800. But since I feel these are "long term keepers", my real expense IS the $2700! The Cary will probably stay as my primary all-tube source for a long time unless I go SET. But my friends know I've said that kind of thing before....
So it does depend on how you look at it: is your cost the money you spend, or, is it the combination of the depreciation hit you take while owning it, plus opportunity cost of capital, plus any transaction risk.
Digital depreciates much faster due to technology improvements. $10,000 for a DAC that will be worth $500 in three years? Ouch!
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