Here is my website https://carlyprints4u.xyz/ i would like to have a contact us instead of buy now, so when customers are interested they can tell me how they would like the order to be customised & I would send them a quote based on the customization.
Hi @carlyprints
In this case if you try to change the button Buy it now on the product page,
you need to change some custom code in the file product.liquid in the folder sections.
Hello @carlyprints 
You can use a “Make offer” app, for example
https://apps.shopify.com/make-an-offer
(we do not promote other apps as affiliate activity)