Late in 2014, a number of news sites covered an exciting new feature coming out of Amazon HQ - Make an offer. In theory, this would provide a bit of flexibility to the buyer and the seller versus fixed price.
I haven't heard much of it since and with good reason: It's limited to a couple niche categories: Collectibles, Fine Art, and Used/Refurbished Personal Computer items.
Personally, I've never come across an item while shopping that had the "Make an offer" option available and I do my fair share of Amazon shopping. Okay, it's pretty much the only place I shop unless someone drags me out of the house or I need meat.
In general, any "make an offer" system can have flaws. Ebay sellers know this - you get inundated with lowball offers and bizarre stories. Setting an auto-reject lowest offer threshold clears that up most of the time. Additionally, the option is well... optional.
As a buyer, it would be amazing if more items had a little bit of wiggle-room, at the sellers discretion.
It seems win-win.