One of my other pastimes besides MDing and bottlehunting is stereo/hi-fi. About ten years ago, I was visiting my sister and I saw one of her neighbors had piled a bunch of junk out for the next days' trash. It took me mere seconds to dig this Pioneer SX-1250 out of the mess. I was surprised to find that it not only worked great, but it pumped out 160 watts per channel! I still use it regularly.
Then about two weeks ago, I saw a house in my city that workers were emptying the contents of into a large walk-in dumpster. There was an array of furniture in the yard that they were offering passersby before it was loaded into the junk. I grabbed these two Marantz HD-880 speakers and do they ever sound great. Both of these totally free, got by being at the right place at the right time. Why people discard this great stuff, I'll never know, but I'm glad they do!