Most expensive: I got into serious photography when I bought my Nikon D80 DSLR with kit lens and SB-800 speedlight. That was $1400 and I have no foreseeable plans to upgrade unless at some point I find myself a D700 for cheap. If you only count analog gear, it would be the Tachihara Zone VI 4x5 kit I bought last November for $600 from the local camera shop, which included two Schneider lenses, film holders, and other goodies. It was too good a package deal to pass up.
To even that out, I've received a few cameras for free, or next to nothing from APUG, RFF, KEH clearance, etc.
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