The other posts are correct. Buy as much as you can afford -HOWEVER- decide what you want to do with it. I am a weekend mechanic, however, I have not used mine for sandblasting or spray painting, and I do not have a large electrical service in my barn. therefore, I bought a small 12 gallon oiless compressor. It serves me well. I have under $200 in it and I have run impacts, drills, chisels, air nailers, nibblers, ratchets, and the whole run of air tools. I doubt, however, that other than a small touch up sprayer, I could do much painting, but then again, I don't intend to. The neighbor has a large compressor of the types mentioned in the other posts, and he still rents a portable job when he sand blasts a tractor. Others have said on the boards that sand blasting is very demanding and that other than small parts, you may want to rent one. I am very satisfied with mine, I can roll it around (I have taken it into the house to run finish nailers) or use it outside. Guess the choice is yours- figure out what you want it to do, how much you can afford, what electricity you have, and then start shopping. Hope this doesn't confuse things. JerryU
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