Got my airbrush on Amazon.ca for about $22, and it's wicked... perhaps I don't know any better but I really enjoy using it.
Small electric compressor for about $100 works well, is quiet, and reliable.
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Tiger I - Panzer II - Panzer III - Panzer IV - Chi Nu Kai - Panther G - KV-1b 756(r)
M4A3(76) Sherman - T-34/85 - M3 Grant - SECRET PROJECT