Great advice from Don, some folks luck out and get a decent cheap Chinese airbrush, most get something of questionable quality at best. Far better choice to buy a quality name brand, Badger is my choice, although I do have Paasche, Iwata and others.
Badger's are inexpensive, when the quality, performance and extreme durability is considered, plus any parts needed are also readily available. Of the 11 Badger's I have purchased, only twice have they required minor warranty work, Badger Company sent the replacements with expedited service, even before they received the ones I sent back.
Buying used is a shot in the dark, the few times I have done it, they arrived with issues that I had to resolve. Usually in a very poor state of cleanliness, a couple of times I had to order several parts in order to make a functional airbrush.
I'd recommend a look at USA AIRBRUSH, I have bought from them and consider it to be a very good seller, at good discount prices. They get high marks from me.
Patrick
As was mentioned, this appears to be the same as the Harbor Freight deluxe airbrush. You can see my review of that one on this page. Quality can vary a lot on the Chinese made airbrushes. I have two of them that work reasonably well. But, you will probably eventually want a name brand brush anyway.
If you buy a used one on Ebay, it may need some work, or at least some cleaning. I'd pick something with readily available and inexpensive parts.
Good luck with it and come back if you have problems.
Don