If there's a Harbor Freight near you, take a look at their tools. I have one of their framing nailers (for a couple of years) and a small brad nailer for about 3 months. They get air from a Lowe's (6 to 8 gallon?) compressor. They both work just fine for me as a part-time casual woodworker.
If you are putting nails in wood as a construction professional, they may not hold up as long as the $$$$ brands. But for my uses they are fine.
Why the framing nailer? I needed one for a specific task, building a wall to make an office in part of the workshop. Looking at options, it was cheaper to buy one from HF than rent one for a week from a big-box store. Since then it has only had a few days of use, and I will probably drop it off at the Habitat for Humanity store by the end of the year.
Graeme C. Payne
Middletown, Maryland, USA
I try to learn something new every day. Then I try to remember what it was!