Purchase a direct image download.
First and as an important aside: I use "Stripe" as a payment processing service, (implemented via the "Cart Plugin" of the "Koken Photo Publishing Server Software" hosted here in Berlin, Germany) - which is, to my best knowledge, a european, safe and secure payment processing service. BUT - the way payment processing is implemented on my site (Koken etc.) - things do not comply to Strong Customer Authentication as required by european laws.
So - things work a little like in a grocery store, where you can buy things up to a certain amount because your credit card holding bank allows you to do so - or not. It depends ... please read more on this here, especially the part on Payments below 30 Euro:
Each purchase from my site is a single transaction, nothing recurring like an abonnement, even if prices will always be the same for each item- but may change at any time below the thresholds given. Well, this depends a little on what's going on in the grocery store :) I hope these ways and transactions find confidence - as they do for me.
So you purchased something? Great ! - Instantly dowloaded Image data should in almost all cases be good to go to any printing service of your choosing. Feel free to contact me via email in case you need any help on putting things together for best printing results . Creating a 300 dpi A-Formatted .pdf of an item isn't too much hand work (for me, but a hell to automate).
In case you do so I keep asking one question up front: would you mind sending me a photo of the final print in your intended setting ? This would be a truly satisfying completion of the art work.
In any case - if you feel uncomfortable with your choices along y/our art works purchase story, or for other reasons, feel free to contact me and require a refund of your payment.
Thank you !
And best wishes - Benedikt