Yes, based on a track record of being able to produce the thing. I'm not paying someone for a master piece of who never painted a masterpiece.

No one paid me for emergency medical services until I proved I could perform them.

No one paid me a high salary when I was a web developer until I produced work that was of higher worth than what I was formerly paid.

I didn't buy my truck before the company was capable of producing it. That's a kickstarter, not a trade.