What? A complete stereo for under $100?!?!
IMPOSSIBLE!!!!!!! LIES LIES LIIEES!!!!!!
No John, it's all in the miracle of bargain hunting.
That's right, for under $100 you could compile an entire stereo. Will it be pretty?, only if you plan on waiting for 5 years to find all the matching mint shiney stuff. In under 2 months you could compile a system like this one.
Polk Audio RT7 bookshelf speakers: $20 (was $50 on Craigslist for those with a Kenwood stereo receiver, sold the receiver to a pawn shop for $30)
Mitsubishi preamp: $5 (high noise floor, but easily dismissible at all but the quietest levels of output, also was missing attached power cord. Once the cord was replaced there have been no issues)
Kenwood stereo amplifier: free (lucky find in my workplace's warehouse. I've picked up similar amplifiers for less than $40 in garage sales, thrift stores, or pawn shops. You can pick up the matching amplifier to the Mitsubishi preamp online for $30+shipping buy it now. I have the matching amplifier, sadly it has no output)
Magnavox CDB-650: $25 (yes, I've had it for a while, but you can pick up CD players a dime a dozen just about anywhere and they don't sound drastically different anyway. It's hard to find a CD player that is truly garbage)
Total: $50, factor in cost of an amplifier or receiver to be a few dollars more than the cost of my preamp/amp combo and it still gives you room to breath at still under $100.
Another pic for fun...