Literally none.

And for $3000, I'm guessing they are high mileage or salvage titles. I never recommend anything but a clean title and none of those cars hold up over the long haul.

Hi David,

Of all three of those cars, I would choose the Mazda. They are fairly solid cars. Nissan has had build quality issues with the cars and parts in the 2000's in general. My father has had a 2007 Nissan Altima with the V6, the VQ engines are fairly solid. He also currently has a 2012 Nissan Frontier PRO-4X (which I use), it has a solid engine (because it is the 4.0 VQ), BUT it has had to have the bumper replaced twice and the axle replaced once. In general, their trucks are decent, but I would stay away from Nissan sedans of that era (IN GENERAL). The Infinity is a decent car but it is just a fancy Nissan, so watch out on build quality (plus, parts and insurance might be expensive, but I dont exactly know). Of all three the Mazda SHOULD be the most reliable plus, Mazda service isnt crazy expensive. It may not have the same features as the Infinity but if you aren't looking for fancy or sporty I would go Mazda, the Mazda 3 is a solid small sedan.

From,

Dylan 

EDIT: Overall I agree with Mod_Man for 3k you wont get much.

P.S. I am 15 so feel free to take my opinion with a grain of salt, I completely understand. 

I would keep looking. I wouldn't touch those on a ten foot pole.

Of those, I’d get the Mazda. Don’t even think about the Infinity. The Altima could be ok if you’re planning to only use it as a cheap knock around car, but honestly if you’re looking for something to use as an everyday driver I’d try and look for something newer, and if reliability and longevity are important to you, I’d definitely recommend something from Mazda, Honda or Toyota. 

Well I have owned 2 mazdas and had great luck with them. Plus parts not that expensive. BUT also ask if these cars have any maintenance history that can be proven!

I would not buy the Mazda since those years like 2007 are notorious for rust and their auto transmissions are kinda weak. The Altima with a manual is decent but do not buy one with a 2.5 4 cylinder since they blow head gaskets and are known for excessive oil consumption and destroying the cats, if it's a V6 they don't rlly have those issues unless they are abused. I would get a mechanic to check out the Infiniti since those i30 sedans are pretty good cars (it's just fancy maxima after all and they are all made in Japan) and if it's good, go with the Infiniti.