Nick here from Shopify. Great question!
This is definitely possible. You can pause your store which will reduce your monthly plan cost to $9 per month. It will keep your storefront, admin, and all aspects of your store the same but disable the checkout aspect.
You can see the help guide Shopify has with all the information about this here. Let me know if you have any other questions about anything
All the best, Nick
For others that want to make thier myshopify store more like a showroom but without losing access to things like the POS, some related customizations:
Remember to also turn off dynamic payments button
@Nick what happens currently if a checkout url is hit? Is it just a redirect to the homepage? or setable to say a policy page?
And is this P&B plan doing anything to store data like turning off product.availability, etc?
Note to self: would quickly disable addtocart buttons but in most cases incorrectly show up as "sold out", without a translation change.
This is an accepted solution.
The Buy Button/checkout link would need an endpoint (ie the checkout), so if that's not available, then the link will open the error page in this case and it wouldn't be possible to point it somewhere else. Everything else about the store will remain the same.