Ask HN: How do I find out what people will pay for my product?

I have spent some time developing a feedback widget for startups to use on their own websites to entice their visitors to record their screens and submit their feedback. It is a free tool right now but that's largely because I have no idea what to charge for it.<p>I know user feedback is something people desire for their startups but finding an affordable solution can be a challenge. That's why I developed this screen recording widget.<p>You can see it here at http://betapunch.com. Any feedback you have for me in terms of pricing and if it's a worthwhile product is appreciated.<p>Thanks