I actually own a 1998 Audi A4 2.8 Quattro with close to 160,000 miles on it. It is by far a very reliable car, I drive it to work everyday and even to this day take it on long trips. Just a couple months ago, I drove it from Dallas, TX to Orlando, FL without any problems (Well over 1k miles each way). Like the other's are telling you, make sure to have the timing belt replaced before you purchase the car. It cost me $1,700 to get mine done at the dealership. I would also take the car to a independent mechanic to check it out (Check the engine oil & condition, These cars have sealed transmissions so you should request that they drop the transmission pan and check the fluids there too). I would also have the mechanic check the control arms & steering colunm. My Audi is a very good car and I would recommend this car to my mother. Just keep in mind that when you have regular maintenence performed on these cars, it will be more expensive. I only use synthetic oil in my audi, again this is a bit more expensive but it's worth it; oil changes for me are usually $55 and I only use premium gasoline and it usually cost me $40-$45 to fill the tank. If you're looking for a nice luxury/sports sedan, this is the car for you. It's fast, handles very well and very comfortable.