Sorry to tell you that there is no such thing as a Q45 for a very good price.
Whatever you budget for repairs, double it .
To really bring a Q45 to oem spec it will cost a small fortune and it won't be worth it.
It makes a lot of sense to buy another car for parts.
If it has rust, run.
If you're looking for a daily driver and are on a tight budget, try a different car.
Now that that is out of the way, if you do buy it, best of luck. This forum is the best place in the world for help and the guys here are a class act. If it hadn't met them I'd be lost and owe them much gratitude.
Regarding teh car you're considering:
The car does not have 340hp . I question how much servicing the owner has done in the last 6 years since he only talks about the specs of the car that everyone already knows rather than a long list of maintenance and repairs that are what's really important. Don't forget there is a dent in the fender.
I'm only writing this to prepare you and possibly protect you from making a decision based on emotion and falling for the allure of a big luxury car for cheap, instead of being equipped with knowledge and logic. Keep in mind that Hyatt and Ericksen may be close, but parts won't be cheap.
If I can help you in a way, let me know. My email is
[email protected]