1, 4, 5 = Autotrader and cars.com are a good starting point. They have filters you can use to narrow down your miles and price target.
2, 3 = One doesn't go with the other. if you consider any car and buy it for its reliability, the moment you start modding the car, generally speaking, reliability gets compromised.
08 E63 AMG Wagon
12 Frontier Pro-4x
14 Pathfinder Platinum