Canon EOS 1D new in 2001: $5,500 ($7,536 in 2015 dollars). Purchased used for $162.50 in January 2016.

Canon 1D

Canon 7D2

Canon 6D

Canon EOS D30 new in 2000: $3,000 ($4,110 in 2015 dollars). Purchased used for $85 in January 2016.

Canon D30