As a publisher, you are building a curation brand. You should also be building a community of collectors who follow your curation brand.
Building a community will benefit you enormously. So make sure that in addition to helping artists build their brand, you are building your brand as well - through social media, artist interviews, your own Discord.
Your community will become the best possible place for your collectors to gather, and for you to do pre-sales.
It will also be a great place for you to hear feedback from collectors about what types of art they want to see more or less of.