Nelson-Reeds were high quality domestically-made speakers from '80's. They were low volume and targeted studios and some high-end audio sales. I'm almost positive they're out of business. I've only heard their tower versions, which cost about $4K/pair new in '87. They were very good for their time.
Since these things are orphans you'll probably have trouble getting much more than $100-150 for them. Try advertising them on Audiogon.com. Maybe you'll happen upon someone that's an N-R fan and scoops them up.