NaN looks more like a glitch to me. Which made me close the website immediately. I’ve heard about their « contact us » model thanks to HN.
It's on purpose because the pricing model is still work in progress.
I might recommend saying "Contact us" or "Coming soon" – I also thought this was a glitch or that you were attempting to serve personalized pricing and it wasn't working.
Was not obvious to me at least
"Contact us" to me almost always means "you're going to have to talk to a salesperson who's trying to maximize their commission." That doesn't sound like someone who's "buying domains for fun" would really want to do. It also adds a significant amount of friction to your customer acquisition process.
I agree, I also don't like it. "Contact us" has been removed