If you're thinking of getting serious about your painting this year, I suggest you take advantage of this offer if you are within the USA, international as well if you don't mind the shipping costs. $55.00 for a great airbrush, offer is good for the next 10 days if you follow the rules.
I've been using a Patriot 105 for about 3 years, and a Renegade Krome for the last year (which I got on from the 54th b-day sale). I have to say that it has remarkably increased my productivity and quality.
Here's the info below, you can't get the to the actual page without emailing: firstname.lastname@example.org[/size]
As it says above, you need to have the patience of a Buddhist monk to see this through. They get a ton of orders from this offer. I think Firepower might have gotten one last year as well.
All I can say is that airbrushing is a steep learning curve, but when you finally nail it, it's like A-Team, "I love it when a plan comes together". Because that's what you need to do when you airbrush, plan it out!