I have a pair of B&W DM604 S3 floor standing speakers. Paid $750 each for them in 2005/2006. Haven't used them for about 3 years since my receiver and turn table died. Anyway, I'm looking to sell them but I have zero knowledge in speakers or their resale value.

I plugged them in about a month ago and they sounded great to me but I don't have an audiophile's ear. Is there a standard test I can run with a buyer? My main questions are what is a fair price on my end & what can I keep in mind to protect myself while selling used audio equipment worth several hundred dollars? I worry about having to hear from the buyer anytime something needs upkeep since I don't even know the lifespan or upkeep for speakers.

PM me if that is easier. Much, much appreciated!