well i guess there is indeed somethin' i can learn with all this... I've never done dumpsters before because i don't really know any in the soroundings of my hood but i managed to get 2 old boxes (1 even came with a screen) by simply mailing a known computer seller in my country and kindly offered my services to pick some of the things they couldn't manage to sell.
Try that and when they contact you try not to sound to knowladgable ( ), otherwise they might just give up on the idea