Get every penny you can. That is the eBay way for sure. I agree it is a free country and it is your equipment. No worries. I hop[e you get a grand for it.
I made a WTB listing for a pair of K-Horns and Fortes on Audiogon recently. I was contacted by two different sellers, both with mint equipment. Both could tell right away that I appreciate the quality of both sets and was eager to make a deal. We made deals that made us both happy.
The guy with the K-Horns is selling them to me for several hundred below market. My new forte buddy is driving two hours out of his way to help me out and sell at a fair price.
Both could have easily sold on eBay for more money but seemed just as satisfied helping out a fellow Klipsch guy and getting a fair deal for themselves. That is what makes the world go round. Hell, I sell stuff on eBay all the time and alot of times get more $$ than my stuff is worth. A sellers marker for sure.
I was not saying that you, the seller, were 'wrong' for adding a $750 BIN. I am saying that if $750 is market on an Academy, that is 'wrong' and you can count me out.
Good luck with your auction and future food fights.