Bought my S60 used with 60k miles, and couldn't be happier with the price I paid. While I was not completely happy with the overall acceleration from stop (which was greatly improved by adding a cool-air intake for $30), the performance and handling of the car is great. Before the addition of the intake, the car got 30 mpg (around 35 with). I get positive comments all the time regarding the looks of the car. The bi-xenon headlamps, leather interior, and 18 inch wheels are must-have options that drastically change the appearance of the car. The handling on windy roads is fantastic. Acceleration from stop is not great, but makes up for it in the quick jump it can make from 40 to 80+ mph
Body styling, comfortable front bucket seats, heating/cooling system works extremely well, quality leather upholstery, traction control, handling/suspension ride, the little button you can press to drop the rear headrests (it's both cool and convenient), the premium sound system
Engine needs tuning and little tweaks to beef up to decent standards. Leg room in the back seat is very limited. There is only one button to lock/unlock the doors, which is a simple annoyance. Oil changes require you to buy your own oil filter at another venue.