For $6k, I'll turn your idea for an app into a clickthrough prototype

For $6k, I'll turn your idea for an app into a clickthrough prototype, in 14 days.

- All I need is a rough outline of the app - I'll improve the UX - Design the UI - Turn the UI screens into a clickthrough prototype

Deliverables are: Production ready Sketch files, UX wireframes as well as the clickable prototype.

$4.5k here...

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Seriously though - am I grossly underestimating how complex the conversion of an outline into a non-functioning clickable Sketch prototype is? It's been a while since I was a full-time web dev/designer (my lumping the two together should indicate how much time.. :) but $6k sounds like a helluva lot?

It could be a heck of a lot. Or it might be quite cheap GIVEN THE SIZE AND COMPLEXITY of the app.

If I were I customer I would ask for a specific quote based on the app that I had. I would ask for each step to be broken down into stages and the length of time needed to do each stage. I would ask for deliverables at each stage. I would try to figure out what I was paying the provider. If I saw any inclination to hide this info I would move to another provider. Like anything else I would be trying to establish if I were getting VALUE for what I was paying for.

I think a lot more people need to build a prototype to validate their ideas, before jumping into development. Have you had any luck getting paying customers at that price?