How should I sell or get rid of my 1999 Toyota Camry?

I agree with Toyota Obssession but it sounds like you fixed almost everything that would go wrong. Why not enjoy another 11 years out of it? That Moutaineer is cruising on borrowed time. The reliability sucks on them. Being that it only 40,000 miles on it, you should be okay for another year or two before you'll have to start making repairs on it. Also, fuel consumption is high and your insurance will go up. Not knock Ford because they actually have been making pretty good vehicles for quite a while. The Mountaineer is not one of them. Also, consider that Mercury is disappearing after this year. Just pay for a diagnostic and find out what is actually wrong with the car before getting rid of the Camry. It might be something minor causing the issues to mimick other problems. Sounds like you're taking the car to idiots (- yes, some Toyota techs are guilty of this too.) It's most likely either intake or exhaust related. I'm thinking dirty EGR valve and/or throttle body. That's what it sounds like to me. That could cause the other problems as well. Heck get the Mountaineer, sell it and the Camry and buy something more reliable.