The European speakers with a very well-regarded sound and the non-disputed king of WAF is the Boenicke. I am not sure whether they appear on the second hand US market but if they did the W5 or W8 model might reach your budget. Don’t be put off by their diminutive size: they have a sound which implies a box twice the size.
My wife loves ours.
Here’s a picture:
http://www.the-ear.net/review-hardware/boenicke-w8-floorstanding-loudspeaker
My wife loves ours.
Here’s a picture:
http://www.the-ear.net/review-hardware/boenicke-w8-floorstanding-loudspeaker