I've learned from research and experience that you shouldn't ask anyone how much they're willing to pay for anything. You pick the price you want them to pay and adjust accordingly based on your goals. Do you want a lot of sales at a low price or a few sales at a high price? How low can you go while still turning a profit? It's a lot of experimentation and you also have to consider your competition and myriad of small things. But you just can't base your price off of what people say they'd pay. You and your customers will always have competing interests when it comes to price. They want to get as much as they can for as little as possible while you want to maximize profits. You'll know you priced your product right when you hit your revenue goals.

It's actually way more complicated than that but for the love of god just don't ask people what they'd pay. People are terrible about managing hypothetical money and purchases.