All one has to do is troll through the car auction listings on Ebay and you will see hundreds if not thousands of fraudulent listings. They stand out when you see a deal that is just too good to be true. Right now, searching through the keyword Ferrari I find many in the normal range of $100,000 plus, but there is one 2006 that is selling for $30,000. Why is it selling for less than 1/3 of its value? There is no mention of a wreck or damage and it has low miles. This is because it is most likely a fraudulent listing. There are many listings like this and this is only the start.
Your fuel and air filters should be treated differently. The former should last for years (assuming it’s OEM-certified). A good rule of thumb is to replace it every three years. The latter should be visually inspected each time you change the oil. Your air filter’s job is to prevent dirt and debris from getting into the engine, but it also allows air to pass through. It will eventually become blocked and need to be replaced.
You can also make the flow faster on the other side of the catalytic converter price guide with the help of a cat back exhaust. These have specially manufactured bends that help maintain a smooth flow through them and thus reduce the back pressure. Since the muffler is also a part of the cat back exhaust they are also able to sculpt the sound that your car makes and give it an upmarket signature sound.
Unbolt the old exhaust system beginning from the rear of the car and make your way forward. Typically, the bolts are rusty and difficult to remove unless you’ve got an impact gun. Apply some WD-40 to penetrate the bolts.
Next inspect the interior. Ask for the keys so you can check the accessories. Make sure everything on the interior works. Check the headlights, turn signals, horn, and radio and take note of anything that needs to be fixed. Roll all the windows up and down. Start it up and check the gauges. Turn on the heater and air conditioner.
It is not absolutely required, but it is a good idea. The factory by-pass valve is prone to failure, and an aftermarket BOV is probably a wise investment for preventing turbo damaging compressor surge. And it sounds cool too. However, it must be noted that if you still have the factory mass-air flow sensor, a blow-off valve, which is vented to the atmosphere, may cause stumbling between shifts.
There are professional car inspectors. You will find them locally in your yellow pages. You could hire one of them for around $100 dollars per car and watch him inspect a car or two.