Do not waste your money on testors. Go to Wallmart or Homedepot and get yourself a compressor with a tank for less than $90 and buy yourself a decent airbrush like an Iwata Revolution CR or Iwata Eclipse. I personnaly use and Iwata CR and Iwata HP-C Plus and they are both great. I owned an Aztec 4709 and it is garbage comparred to Iwata. The Aztec lasted about 1 year before the internal mechanism's failed, they just wore out. I have owned the Badger Anthem 155 but I prefer my Iwata due to its being Gravity fed. Check out these sites for price comparrisons.
http://dixieart.com/
http://www.bearair.com/home.asp
V/R
Rob