Polk 10's from the early 80's... I believe they can be had used in this range. I use to run them "back-n-the-day" with a DH-200, and they sounded very very nice.
Used speakers
I've recently upgraded and am giving my nephew my ancient Hafler 220A amp and Hafler pre-amp. The amp is rated at 120wpc. As befits a 16 year-old, he likes his music loud with lots of bass. I'd like to get him some used speakers in the $250 range. Any suggestions, biggest bang for the buck? Do I need to spend more?