mrswede said:
I am looking to buy a cheap 4 seater. $30k or less. I have been looking at Piper 140, Tri-pacer or Beech Musketeer. Which aircraft would have the lowest maintance cost and least problems?
It kinda depends on what you want the plane for. You specified 4 seater. If you really plan to fill all four seats very often, then I believe the Tri-Pacer will haul the biggest load. Don't have the figures in front of me, but I've been told several times the PA-22-150/160 will haul 4 170 pounders and full fuel. (legally) Can't think of another aircraft in it's class that will. On the other hand, the Tri-Pacer is fabric covered, so you'll need a good pre-buy, there likely won't be much in radios, and insurance is normally higher on a fabric aircraft. They're generally noisier, and colder as well.
Of the rest, The Cherokee is going to have used/refurbished parts available, Beech parts are expensive, even in aircraft terms. A few Commander 100s are available, but it's an orphan with few to no spares available. The 172 is the most popular and often the most expensive of the class. You can find a Skyhawk for less than $30k, but if you are picky at all about things like log books, records, appearance, and radios, you won't like what you get for $30K. On the other hand, there's tons of spares and STC'd parts for C172s out there. Those built after '68 will have the Lycoming. The 180 hp conversions I've seen all go for $50k and up. The STC costs about $20K to install even after you sell the old 0-320.
I think you'll find the Cherokee is a bit cheaper to buy and reasonable to operate, but if you need (again) all four seats for seats, then you won't be happy with the Cherokee unless you live in colder climates close to sea level. The Cessna is just a bit better in hot weather. (not much)