Then if it was one silly lowball offer, people must not want it as bad as you think.
Not relevant.
If I, for example, think a book is worth $10,000, but the market thinks, through multiple established sales, that the book is really worth $1,000, but my only offer....for whatever reason....is $500...forcing me to sell it for $500 isn't going to fly with anyone.
I think we're now getting into technicalities of "worth". If it's worth $1,000, someone should have hit the BIN for $1,000 (or sent a similar Best Offer).
You can't "hit the BIN for $1,000" if it's priced at $10,000. As someone should have sent a best offer for $1,000, that's not necessarily the case at all.
As I mentioned above, "the market thinks, through multiple established sales, that the book is really worth $1,000"
eBay created that clutter by moving away from, and actively discouraging, their auction model, and trying to become "Amazon-lite" with their "Buy It Now" model. No one is forcing a seller to use eBay, but no one should be forcing a seller to sell at a price he/she doesn't set, either, in a non-auction (and sometimes even in an auction) format.
Forcing sellers to take a price they don't want, to clear up "clutter", is a good way to drive eBay completely out of business for good.
So, maybe it's NOT such a bad idea after all....