The cost of a fixed/track hub + new spokes + labor (if applicable). Look around for the cost of the materials and ask your LBS for a quote on labor.
Originally Posted by slopvehicle
Not wearing a helmet makes me more aware of my surroundings. I find myself anticipating the hardness of concrete 50 or 100 feet in front of me, it's almost a zen-like connection between my face and the pavement.