Thought I'd chime in. I highly recommend this one:
http://www.testors.com/product/137119/A4702/_/Solo_Resin_Airbrush_Set
You can pick these up on Ebay fairly cheap. Great workhorse airbrush. Easy to use, easy to clean, easy to...well, everything. The model that I linked to is one of the more basic versions. I have one of the models that comes with more attachments and nozzles. With all of those options, I only use the stuff that comes with the basic model
The airbrush itself is exactly the same. Add compressor and moisture trap, done. Hope this helps!
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