What do you think about me asking my fiance to sell an old, unused car to help pay for our wedding?
How did your fiance react when you proposed the idea to sell the car?
He said he'd do what he wants to do.
If your partner has the means to raise funds to help pay for a wedding, it's acceptable to ask him or her to do so. An used car is a wasted resource and it would be a good idea to put it to use by selling it and using the funds to pay for a large expense like a wedding. You should talk to your fiance and come up with alternative ways of raising money if he does not want to sell his old, unused car.
I'm going to visit him and make sure he sells it.
You shouldn't be so pushy about it, but you should tell him that you want him to sell it. It sounds like he doesn't use it, and like it would be very useful if it were sold.