Wow, GREAT find! I love Weird Stuff and Urban Ore in Berkeley rocks the house. You just never know what you'll find in that place. About 2 years ago I found an old Amiga 2000 with a Video Toaster and I believe a GVP 040 card. The Amiga was dead, but the accelerator card worked when I plopped it into another Amiga 2000 I had at home.
Never quite figured out the Video Toaster. I believe it had some sort of other audio looking boards with it. Been thinking about possibly selling the boards to someone who could actually use them.
I just had to register when I saw that someone else actually checks out these local wonderful places for retroCOMPUTING in the Bay Area. Let me know if you ever want to meet up & dig around for stuff together.