I've gone, but as a rule, I don't touch the food. There's a mini shopping plaza place where there's clothing stores, video rental, KFC and stuff. I've picked up old console systems(like SNESs, NESs, Sega master systems, older computers(like p2-p3 class) fully loaded. Hard drive wasn't formatted and full of personal info and passwords behind flimsy asterisks. I've also seen gonzo amounts of food being chucked out because there's a shop rite there. Just could never bring myself to go there. Knowing the asset disposal people at companies and universities is also a gold mine of older laptops, old servers, monitors out the yin yang(smaller older lcds and some gorgeous CRTs), and just general computer junk.
I imagine you could probably make a killing on ebay now that I think about it.