Two routes exist and they are not variations of one process. A dealer costs more and the gap buys something. Preparation has happened. The word covers a wide range. At best, faults identified and repaired, https://spookyswap.finance/looking-for-a-car-in-the-middle-east-start-with-these-qatar-listings/ – https://spookyswap.finance/looking-for-a-car-in-the-middle-east-start-with-these-qatar-listings/ – a service completed, consumables replaced. Cosmetic preparation only. The invoice settles it. Consumer protections attach to trade sales. What these amount to varies by country and deserves checking for your own. Some protection exists broadly. The private seller offers something different and underrated. Whoever used the car is standing in front of you. Trade staff hold the history and not the experience. The operating knowledge belongs to the person selling. Most private viewings involve very little conversation. The cost of the private route is the absence of recourse. Nothing else stands behind the purchase. Small independent dealers occupy a middle position. Repeat custom constrains behaviour. Two things decide it. Your own ability to judge condition. And how badly an unexpected repair would land. Skill plus tolerance favours the individual. The cautious buyer on a tight budget gets something for the premium. Neither answer is correct generally. Anyone who has bought both ways generally asked what preparation had been done.