MASTER Airbrush Cake Decorating System, Precision Dual-Action Gravity Feed Airbrush Set with Mini Air Compressor Plus 4 Americolor AmeriMist Airbrush Food Colors and FREE Storage Case-The Complete Set Now Includes a (FREE) How to Airbrush Training Book to Get You Started

I bought this on Amazon last year. I just copied and pasted it from my 2011 orders list. The link wasn't working well. Works excellent. Great value for money. I was very nervous when I 1st bought it because I never had experience with airbrushing but it is way easier than I thought. Even a beginner to airbrushing like me got a hang of it in the 1st try. You will need to do research on how to clean your machine with hot water or a cleaner to prevent clogging and splattering during use. I use this on all my wedding cakes with americolor pearl sheen.

It came with 4 bottles of airbrush colour which you can use to practice with. Unfortunately it didn't come with instructions on how to assemble so after a few hours of fiddling around I finally made sense of it all and connected the hoses.

I have this compressor (whatever compressor you buy, make sure the air is adjustable)

http://www.harborfreight.com/1-8-eighth-hp-40-psi-oilless-airbrush-compressor-93657.html

and this airbrush:

http://www.artsupply.com/Paasche-VL-airbrush-set_p_54079.html

There are a few older threads on this site that helped me a lot when figuring out what to purchase.  I don't do a whole lot of detail with the airbrush so I can't speak for that, but it works great the basics that I use it for (I'm sure it would do well with more if I took the time to learn).