Woah, lets look at cost to change into the 350Z. Leon owes 14K on it's PCP, and best offer for it was scraping £9K. Nissan costs £25K, and they want 15% deposit. Thats £3750. I'll need to bridg the gap for the Leon, and thats approx £5K. Total cost is £8750 approx.
Thats not great tbh. I've dug out the Leon's PCP document too, the mininum guarenteed value at 3 years old was set at £8296.17. Lol, it's almost there already at 9 months old!!! they have to agree this value at 3 years right? (Assuming car's not over mileage or in bad condition).
That's how it's supposed to work. I would check the small print though just to make sure.
When PCP first became commonly available there were many examples of Cosworth owners handing the keys back after 2 or 3 years as the cars were worthless due to the massive insurance.
By the way I don't think your cost to change is right as you haven't taken into account the extra payments on the Nissan. That's what you will need to pay cash to change but isn't the true cost of changing. True cost to change is actually £30,000, £8750 of which you'll be paying cash, £21250 being financed on the new PCP. Okay so you will probably not pay the balloon payment at the end.
Cost to change should be the total cost of buying the new car, not just the extra deposit needed.