Almost all the surplus stores are gone. Those that owned their place in a depressed warehouse district lasted the longest. Then they based their existence on the USA tax code. If they made1,200,000 electric things = 100,000 a month = sell to meet orders. Orders drop and they had 20,000 left and parts for the next 100,000. At year's end they can write them off - but can not keep them as written down parts = mandatory third party selloff. Surplus dealers would buy them at 5-15% of cost and sell in want-ads in several weekly mailed papers. Electronic Buyers news (EBN) is one I recall. 10 tabloid pages of all stuff. In the late 80's the internet arrived and by 2005 all these tabloids were gone. Then when manufacturing went to Hong Kong, Japan, Taiwan and China the sources all collapsed. In addition, surface mount and LSI as well as programmed chips, meant used boards became useless for most - few had the hot air chip pullers. I was a member of Hacklab in Toronto = hacklab.to = a hacker shop you pay by the month and they have all types of machine tools, solder/desolder, laser cutters, filament printers,programmers work stations etc, but most use good laptops, Apple, x86 and linux and assorted single board small like raspberrypi etc. Even they buy from Ali express or one of the parts shops online, like digikey.com Times have hanged. I used to buy from ASS. I went to the ASD show in Las Vegas every year. Still going, less electronic surplus, more sell off goods. https://asdonline.com/about/product-categories/