I haven't found this to be the case at all. You can get a decent compressor in the
UK for around £80, and a decent airbrush will cost a fair bit more than that.
To the
op, when I got into airbrushing, I went for a
AS-186 compressor. These tend to be far-eastern made, but is the one you will pretty much find used by a lot of other companies. This model comes with a tank, regulator and moisture trap, so for me, it had everything I wanted when I was starting out.
If you do a search for
AS-186 on Amazon
uk , you'll see the one I mean. I think there's even a listing on there of this compressor with a couple of airbrushes which could be useful for getting you started, although the airbrushes themselves aren't great (I started with this exact pack!) -
http://www.amazon.co.uk/FoxHunter-KMS-Airbrush-Compressor-Airbrushes/dp/B004XP7K9W/ref=sr_1_1?ie=UTF8&qid=1440432614&sr=8-1&keywords=as-186
I ended up going the Iwata route, and currently use a Revolution
CR with the standard .5 tip, and an Eclipse
HP-
CS with the standard .35 tip. The Eclipse covers pretty much everything I want to do, but I'll switch to the Revolution for varnish.
If you wanted a recommendation here, if you believe this is a tool that will be of benefit for you, then I would whole heartedly suggest trying the Iwata Eclipse. Yeah you can get some cheaper low quality brushes, and you can get some that are way, way more expensive, but for me, the Eclipse is a quality brush that is very forgiving in regards to the paint you use, which just makes the whole airbrush experience that much less frustrating.
Hope that helps!
Regards