Invite the sellers with a personal email and give them this link to sign up to sell.
Join an existing region or start your own. Your community can be a region or affinity group. Your seller community should be independent brands, not resellers. Also include entrepreneurs that provide creative services and professional services such as marketing, branding, copywriting, product photography. Do not include realtors, insurance agents, etc.
Once there are at least 12 sellers with active products, we will build a custom landing page like this one on the Wholesalerie subdomain. Wholesalerie is powered by MakerPlace Inc. and is completely turnkey - the entire marketplace has fully-managed back-office tasks such as seller portal, payment processing, tax collection, and customer support.