Weird Stuff Warehouse. Haltek. HSC. All gone. Excess Solutions moved online. Jameco took down their "open to public" sign. Anchor Electronics [2] is perhaps the only remaining electronics surplus place in Silicon Valley you can visit in person.
A favourite in Australia that emerged over the last ten or so years is Grays Online [1], which sell everything from estate sales and office equipment, to military vehicles and mining machinery.
(Mentioning the name often made people think I was into alien conspiracies, which had some parallels to the subject of this post.)