My advice to you would be to take it to a full professional. I just bought a car through this site with very low mileage. I had it computer tested and the results were very good, however after buying I found he had turned the mileage back from over 100,000kms. The mechanic says the gearbox and transmission are finished.

Rather spend a little more and have full tests than just the computer test, which good tuning can falsify.

Also, I strongly recommend buying from Qatar Sale rather than here. There are more snakes than sincere sellers. I will lose more than 10,000 on this mistake.