An entire industry of brokers exist to match online business owners with buyers and do these types of transactions regularly.
patio11 has used and spoken highly of FE International (you can see his blog or search HN)
But other brokers like e.g. Quiet Light Brokerage also exist.
It should be noted that these types of transactions have nothing to do with the typical Silicon Valley advice or narratives you'll read about acquihires.
You should let the user go through the entire process of creating the page before you ask for money. Then they have the extra desire of wanting their finished thing.
(I started building a site and put in a form, only to be told that was a paid thing. Closed the whole thing and immediately came to write this.)
patio11 has used and spoken highly of FE International (you can see his blog or search HN)
But other brokers like e.g. Quiet Light Brokerage also exist.
It should be noted that these types of transactions have nothing to do with the typical Silicon Valley advice or narratives you'll read about acquihires.