Climber, if you'll look at the heatsink a little closer, where you got those dates, there will be other numbers there describing the chip. I used to sell those(about ten years ago) for an easy $9.95. Had one out a good while back looking for something about it, just set it up here on the computer speaker, had about forgotten it until yall started talkin about em. Looked on Ebay and they're selling now from $25-$40 on up, depending on the chip