Has anyone been to the paper fair in SF this weekend?

There is a apparently a fair/market of antique paper and postcards this weekend at the building right near the arboretum in GG park. Has anyone been? What is it like? And how to I find out about amazing events like this in the future? Someone mentioned it to me today or I would have completely missed it. I love book fairs, antique fairs, art fairs...is there an email list to get on?