Just the normal things that wear out
my head gasket has been replace about every 2 years for the last six year I have owned it, It cost about 400 dollars to replace, but when you figure how much a new car would cost this is dirty cheap.
This has been the best car I have ever owned, its been so cheap to run over the years,normal wear and tear, paint job stinks and has rust, but what do you expect for Wisconsin, The car starts all the time and it sits out side.
A head gasket only costs $40.00 so you could replace it yourself for a lot cheaper than $400.00.