My better half replaced my old 'cheapy' with a set from Amazon and these are the current prices -
GANZTON Airbrush Set Double Action Trigger Paint Spray Gun Kit Professional Sprayer Air Paint Control Gun with 0.2mm/0.3mm/0.5mm 9cc CUP for Makeup,Tattoos,Cake Decorating,Crafts @£29.99 +
ABEST High Quality Dual Action Airbrush Compressor Complete kit Paint Tool for Art-and-Craft Projects Tattoo Hobby Model Craft Spraying AC06K30W @ £34.99
The second airbrush is crud - BUT, the compressor is good enough for anything from very fine lines at low pressure to whole hulls - it's worth binning the cheap ABEST airbrush to get that alone, or just use it for general priming coats.
The Ganzton airbrush is amazing for the price.
I did polish the needle first, but it's as good as a 'posh' one a mate lent me to try out. Not the cheapest way of doing it, but after a year and a half, it's still going great guns and I ain't changing it for the foreseeable future.
By the way I'm no Amazon fan, but wifey likes 'em so for once they did a good job.