Heads up! The Badger Air-Brush Co Sotar 2020-2F Large Gravity Feed Airbrush with Fine Head is on sale at Amazon right now for the phenominal price of $65! This the best price in over a year!
By all accounts I've read, this is probably one of the best airbrushes you can get for your money. It's gravity-feed, so you don't have to muck around with bottles (my leftover paint mixes always dry up before I can use them again.)
Be aware that this is more a brush for detail - you're probably not going to want to basecoat an entire army with this airbrush!
And yeah - I picked one up. :)