How much can I sell a PDF for?
Updated
Price the problem, not the page count
A PDF is worth what the problem it solves is worth to the buyer, not what its page count suggests. A short checklist that saves a professional a day can carry a far higher price than a long general ebook. Set the price by looking at comparable PDFs sold to the same kind of buyer.
Length is the weakest signal of value there is. Nobody buys pages.
Who buys it changes the number
The same file sold to a business costs more than one sold to a hobbyist, because the business is buying back time it pays for.
Before you pick a number, decide who the buyer is and what the alternative costs them — an afternoon of their own work, a tool subscription, or a consultant.
A method instead of a guess
Find three PDFs aimed at your buyer. Note where their prices sit. Start in the middle of that range, not underneath it.
Then sell a handful at that price. Real sales tell you more than any amount of thinking, and the price is easy to change.
Signs the price is wrong
Nobody buys and nobody asks questions: the page has not made the value clear, and a lower price will not fix that.
Everybody buys instantly and nobody asks for a refund: the price is under what the market would pay. Raise it on the next version.