A word of caution, just because it looks like an Iwata hp-c, do not assume that it will work like one or is made to Iwata's standards. I purchased cheapie for my son and it did function, as in it put out paint. It fit bad, was grindy feeling on the trigger, cheap materials, bad performance. I understand fixed income, believe me I do. But using a cheap airbrush is worse than throwing money down a drain.
The Iwata Neo, Badger 105, 150, 155 are good lowere cost alternatives than a knock off.