Marvin Birnbom started selling WWII surplus in 1947. That business has grown into surplustraders.net, which offers more than 900 pages of deeply discounted electronic overstock. The site lists both bulk deals–1,000 AA batteries for eight cents each, 10 keyboards at $4.50 per–and a few individual items (12.1-inch LCD screens for $89 apiece). But Birnbom, a hobbyist himself, will sell you any quantity of anything as long as you meet the $30 minimum order. Just give him a call: 514-739-9328.