Reddit mentions of Ingersoll Rand 210G Edge Series Gravity Feed Spray Gun, Black

That has a really small nozzle on it. It's for doing touch up work like the description says. If that's what you need it for, it would pry work great for you. I'd suggest shopping around, check amazon out. They generally have pretty good prices, but even if you find a better deal elsewhere, you can at least find informative reviews.

If you want a gun that is good for laying down paint over an entire car, and is a good all purpose gun, then you want a 1.4mm nozzle. But if you are laying down primer then you might be able to get away with the 1.4mm but slightly bigger like 1.7mm is better because primer is thicker.

Here is a decent gun for cheap. But you can also get kits for around $100 that have a touch up, top coat, and primer gun. You definitely don't need an expensive gun to get good results.

It takes a little time to setup the gun. For instance, you need to drain all the water from your air compressor. Set up the air pressure and fan and flow correctly. Make sure to get the hardener, reducer, paint ratios right. The paint will come with a general guide for it, but you won't know if it's good until you start spraying. If you see orange peels in the finish then you need to put in more reducer and/or lay it down heavier. If it looks hazy then more hardener or if it's running then you need less reducer or lay it down lighter. But once you get the hang of it, it's much better than rolling. If you have any more questions, let me know. I can give you some links that helped me if you would like them.