My wife is considering selling her car through a company that has valued it over the internet. She entered the vehicle registration into the buying company website, added the mileage and condition details and - bingo an offer was made within seconds of her entering the details. I realise the valuation will be lower than that could be achieved with a private sale but the advantage of selling quickly could outweigh the reduction in price achieved. I am concerned however, that we are supposed to turn up with the vehicle and hand it over along with a V5 document and bank details in exchange for an invoice from the company promising to pay for the car in 4-5 working days. How safe is this system in your opinion? The company in question seems to be a large, well-recognised chain.