What's the best dirt bag speaker you have heard?

My minimalist side expects speakers that cost thousands of dollars to sound great. When I find something at throw away prices that exceeds my expectations I am inordinately delighted. I recently put a little system together for our cabin. The goal was that if the system was ripped off in our absence it wouldn't be a great loss. The only store in town was Radio Shack. They were closing out these RCA units with weird bi-direction tweeters. They sounded pretty good so I bought them for $40.00 apiece. Having listened to them for awhile now (with a sub-woofer) I am going to feel bad if they turn up missing next year.