Originally Posted by sp00ki

Too many factors. You're looking at upwards of $400, but most likely at least $600 (though it's not hard to wake up one day and realize you just spent two and a half grand building a bike that has no brakes).

The thing about fixed gar vs bmx is there's sooooo many styles to consider, it's nuts.
You're probably used to offset or no offset (or maybe minimal offset if you're "on the fence") and your'e done.
Not with track bikes.
On the one side you have traditional/vintage with njs japanese, italian, et al. On the other, there's newschool track with carbon forks, 1 1/8" steerers, pista concepts, etc. Then there's a million technology choices, too. For instance, loose ball vs cartridge bearings: don't assume loose is automatically inferior-- dura ace track hubs are loose. So are sugino75 bb, which are considered by quite a few to be the best track cranksets available. Then again, some say nothing spins like mks sealed pedals turning a phil wood titanium bb.

One great thing about this board though, is lots of the posters are bike obsessed and really nerdy about components and how bike parts work together. Do random searches for random things (ie "favorite track pedal" or "titanium stem") to get an idea of what names are out there. Then do your research. it can be overwhelming if you're into bikes, as there's a billion niches when it comes to the fixed gear scene, much of which is worth looking into.

(or you can just spend $500 on a complete)