1. Computer History Museum:

http://www.computerhistory.org/hours/

2. Fry's Electronics (Sunnyvale or Palo Alto are near Mountain View):

http://www.frys.com/ac/storeinfo/storelocator/

3. Halted (Santa Clara):

http://halted.com/commerce/info/contactinfo.jsp

4. Weird Stuff (Sunnyvale):

http://www.weirdstuff.com/cgi-bin/category.cgi?category=sunn...

[#2 has new stuff, #3 and #4 surplus]

5. Sawdust Shop:

http://sawdustshop.com/

6. Tech Shop (San Jose and San Carlos locations are closer to Mountain View):

http://techshop.ws/locations.html