The simplest way to allow others to buy your digital file as a professional print is using the Print Link. Use it on a web page, share it on social media or send it by email. The Print Link will direct users to the checkout and payment module. The look of the checkout can be customised, and is available in 9 languages and 31 currencies.
First, sign up for an account at https://www.peecho.com/ and upload the PDF file for the print. It will turn into a Publication with a series of Settings.
Copy the link and paste it onto the medium of your preference.
The screenshot below shows where you can change the currency your customer will see when ordering your publication, and other advanced settings.