Test drive; newcomer seeks information about Jaguar

Hi guys, I’m doing a test drive with a 10-year-old X-Type sport, about 50,000 Kilimeters on the speedometer. I’m supposed to cost 9,900. I have a fage. On the Jaguar homepage there is a premium guarantee for older cars. What does that cost and what is it for? Strange, other guarantees end for older Jaguar. And I’ve seen on the page that repairs should only be done by Jaguar. Competence centers call it. How expensive is that? And does this affect the a resale with a 10 year old car? I’m also interested in sample invoices. The one at Jaguar who accepts the repairs looked into the monitor and twitched the calculator. I guess he took the VAT into account, but not the wage costs. Should he mean he wanted to calculate the sum nicely. How much net should one earn to be able to afford an entry-level jaguar? And if someone drives an x-type, why does he sell it then as 10 years old? If I have a cat I would have driven him further. Give me reviews and please use example repair sum. Thank you