Loved this car from the first time I got behind the wheel! Only paid $2500 three years ago (122K miles). Just turned over 167K....power steering pump, alternator, and two ignition coils have been the only replacements/repairs over those 45000 miles. Very sweet ride!
Bought a 98' for cheap at 72K. Needed a bit, but after valve cover gaskets, belts, battery, oil, air filter, it was ready to go. It sat for years under previous ownership. When I purchased, it had the original belts on it still. A testament to Nissan/Infiniti build quality. It doesn't do bad MPG-wise either. It goes when you need it to. Despite the size, it goes around corners, and stops quickly if need be. And it is comfortable! Expect 19 for city driving. A mix, you'll get 22 if you drive easily. Highway, right around 24 for me; way higher than the EPA estimate. For the money, you could get a Lexus LS400, but it looks worse, and it just isn't as nice. (I have a buddy who has one.)
Just had to retire my 1998 Q45 due to being rearended and totalled. Car had 232000 on it and was overall very reliable. Not a single problem until 155,000 Miles. Fuel Injectors, Coils, and just age were starting to cause more problems, but I think it would have gone to 300,000 if not for accident. Overall, fun to drive, reliable, and excellent value as cost to own is only a little expensive with gas costs. But it proved to be safe as I hardly felt the hit from behind and he was going about 35 miles an hour.