My latest will be about $350 when done.

Cyclops crit bike = 250
Rear wheel = 50
Cog and lockring = 25
short chainring bolts = 10
Maybe a new tire = 20

I should recoup a good bit of that selling off the shifters, rear wheel, and rear mech and I'm thinking about selling the beautiful brakes and picking up a cheap tektro set to make the whole thing more economical.