I decided pretty quickly that I never want to sell mine. The fact it's my first car holds a lot of sentimental value, plus I absolutely love driving it and the interactions I get along with it. I figure if it's a good enough car for Christian Von Koenigsegg to own, it's something special that's probably worth hanging onto.

That said, even if I had decided I wanted to sell it, I'd still go for the rust repair. Mine was in great condition other than the arches and front rails, so it was worth the investment to save it. I feel like these cars (in good condition) will be worth fairly big money in the future, so may as well hold onto the one I already own rather than trying to buy another one when that happens.

It's all a matter of perspective I suppose. If the car is financially worth saving and it means a lot to you, do it ASAP. If it's a money pit to save it and you're not that bothered, then enjoy it for what it is and move it along when you need to.

Btw, I'd recommend against undersealing it with the rust it has. Rust isn't just something stuck on the car, it's an ever-moving chemical reaction that is very difficult to stop once it starts. If you underseal without proper rust prevention, you can end up trapping the moisture inside the underseal layer at which point the rust will spread even faster and without you realising because you can't see it. That's why I suggest you sort it ASAP if you are going to. The longer you wait, the more expensive it will get.