My first airbrush was a cheapo Badger that cost me a whopping 20.00 bucks or so, and never kept it running... It was better than a rattle-can, but not as good as a decent, mid-range, single-action Iwata or the like.. Smallest "line" I could get out of it was maybe an inch wide one.. Worked great for one and two-color camouflage jobs though, and for fading... Meanwhile, I learned more about how to mask..
I didn't buy a "real" airbrush until about three years ago, with the Paasche H-45630 SA I currently use... ( Got that with the good ol' 40% coupon from Hobby Lobby, naturally... ) Bought a Chinese knock-off of the Testor's "Blue Meanie" compressor for 16.00 offa Ebay, too...
I don't really airbrush much, at least not if I have tape and a rattle-can that matches***, and don't need a scale feathered edge... I do use it for sun-fading desrt and tropical camouflage schemes though, which happily, is exactly what the airbrush was designed to do, ie: Applying a smooth, even, transparent layer of color over an existing one...
So, no, I don't have old Badger anymore (nor the second and third ones I bought either, for that matter, lol), since I was guilty of the "I'll get to cleaning it later" syndrome. Probably because they were so cheap...
Also, since I really HATE to clean my airbrush, I keep it's actual use to a bare minimum too... One of the reasons I don't use Future is that clear glosses already come in rattle cans, and with one, the actual job is ten seconds long, while the cleaning is ten minutes... But for some applicatins, it's impossible to use anything BUT an airbrush, ie: certain camouflage mottlings and schemes, or colors that have to be custom-mixed by myself, and combinations of both...
Tool-maintnece is important though, especially compressors and their lube, as well as Dremel tools, attatchments (anything that spins at 20,000 rpm needs to be taken care of without short-cuts or you're gonna GET cut...), drill-presses, vacuforms (anyone with a Mattel Vac-U-Form will tell you that they need care and maintnence too, especially of the heating element and vac-pump/tray...
*** No point in using an airbrush to spray a tank Olive Drab or Panzer Grey or a US Navy AD Skyraider in Dark Sea Blue when the rattle-can is already there, lol...