I've had the opposite experience as this. A seller posts an item with a "buy it now" and also a "make an offer" option. In these cases, I generally make an offer that is only slightly less than the "buy it now." I'm nowhere close to lowballing, and I figure that if they decided to include the "make an offer" option, then they must be willing to take a little less. Usually, this works out great. However, it's amazing to me when a seller won't accept any offers below their "buy it now" price in these scenarios. Not even a 1% less offer, and sometimes they won't even bother making a counteroffer. I had one seller that I went back and forth with on a fragrance, him flat out denying all of my very reasonable offers, until finally he gave me a counteroffer that was $1 less than his asking price. It was for a $125 bottle. Why bother?