H.,
We have a Dodge Grand Caravan and as soon as the transmission hit 140,000 miles it died. It cost us around $2500 to replace the transmission and later learned that this is a major problem with most Dodge and Chrysler mini-vans made before 2003 or so, they both have the same engine.
Check out this website: http://www.cartalk.com/menus/info.html
Tom and Ray (aka: Click and Clack the Tappard Brothers) from NPR Radio have a great website that is dedicated to all things cars. On the above site you will find links to resources you will need to find a great car that will work for you. The second link down is the Auto Advisor and I highly recommend anyone searching for a car take the time to go through this program. Enter your likes, dislikes, and budget and it spits out a number of different makes and models of cars.
Also, a little farther down the page you will find the Model Reports, this link gives you the Good, the Bad, and the Ugly details on the car models you are thinking of purchasing.
I wish you luck in your search!
-C.