I have an Alibris account, and probably sell 1 item on there for every 100 items I sell on Amazon. It’s definitely useful for things I can’t sell on Amazon.
Is it this place? It appears to have closed in 2013; I’m still in the process of finding out why.
ETA: The owner died in 2012.
It was a outreach program office by 2011 (according to Google Streetview) so more likely closed in 2009 or 2010. You can see it in the 2009 dated view.