"Ile jest warty wasz samochód?"

Translation: How much is your car worth?

[MarekOkroj]

I would say "Ile jest wart"

[Martin95000]

I agree, it should work!

[Jellei]

And it does.

[WquDT]

I was wondering why "your car" isn't in genitive. How much is the value of your car?

[alik1989]

"Jaka jest wartość waszego samochodu?"

The genitive would have been used if there had been a second noun, but warty is an adjective.

Although, technically, wart is the correct form. It's one of very few adjectives that don't have the masculine -y ending. But many natives aren't aware of that.

[WquDT]

Dziękuję za odpowiedź. Teraz rozumiem.