Hello, My 2007 Expedition, while running great at 225,000 miles, must be near the end? At this point I have to consider something bad will happen as NOTHINg bad has happened other than replacing the Water Pump at $600 dollars. I've probably put no more than $2000 into it from 85,000 miles, when I bought it, till now at 225,000 miles. It's been a great truck. Dependable and comfortable, but I realize it can't last forever. Where do you guys look on-line for the best prices? I look at Carsforsale.com, but I realize those are mostly dealers thus over-priced. Ideas?