Perhaps having a place to let vintage dealers advertise the shows they will be selling at?

@chvadmin - getting most of your traffic from FB makes sense because you moderate several popular FB pages.

I started my first website in 2007, and the biggest traffic driver was SEO/Google traffic. That has steadily declined and continues to decline as search engines are trying to keep traffic in their ecosystem with AI responses, ads, and other outlets pushing organic content further down the SERPS.

But this is great - having a website as your platform and several FB groups to drive traffic gives you more than many sites have now. That is a recipe for success. I saw that you are trying to do more with social media (Instagram, for example), which can be another method of driving traffic and brand awareness.