Parts can only be bought together with a computer

When I try to buy a finger print reader 2th gen or a battery when it was available in the Marketplace the message below pops or popped up upon checkout:

Sorry, we only have stock of that item at one warehouse. You can only purchase it when combined with a laptop order.

My experience is that parts are regularly out of stock or that parts can not be bought even if they they are available in the Marketplace. I contacted support about this but that did not help.

What is your experience?

Thanks in advance.

Location: The Netherlands.

Hey Otto, the error message you received means the part is out of stock. We’ll update it on the Marketplace, and you’ll be able to join the email list to be notified when it’s back in stock. Thanks!

Thank you for your reply. I genuinely think that the Marketplace for the Netherlands needs some attention. Batteries e.g, have been unavailable for quite a while now. If the battery of my laptop stops working, I can no longer use it. I bought this laptop to prevent this situation.