Oh dear. Let's see.
In order of purchase:
KB-5181 - $2
Model F XT - $20
Model M #1 - $20
Model F 122 #1,2 - $70
Model M #2,3 - $40
Model M #4,5,6,7,8,9 - $120
Model M2 - $1
Kishsaver - $240?
4704 107 key - $150
total - $663
This is including shipping, but not including resales which have recovered a fair amount of my costs.
[Edit]: I completely forgot about accessories. I've got like $50 in Teensies in various stages, $40 in parts from Unicomp, $15 in extra cables for Model M, plus a couple other things I've got no clue what they are now...