you only posted trades of people offering to buy, which means nothing. I could put up a trade saying I'll buy a merc's pride for a ref, that doesn't make the value of the item a ref. The value is what trades are completing at. your evidence doesn't even support your price claim anyway.

link 1- offering 1.5 keys. 0 takers.

link 2- offering 1.75 keys. at least 1 seller

link 3- offering 1.5 keys. trade is months old, he's got a few sellers and not recently

link 4- offering 2.13 keys. has a lot of sellers.

link 5- offering 1 key. not a single seller in the month the trade's been opened.

Your trade- sold for 7 ref (2.75). that you got a lower offer is not even relevant.

So i have no idea what you think this evidence is pointing to because it's not supporting this randomly specific key value you seemed to have pulled from nowhere.

you are also suggesting a value that falls within the current range.

maybe this item needs a price drop, but you didn't suggest a price drop and you certainly provided no clear proof to support it. Clearly this is not "self explanatory", so maybe you'd like to try.

Whether he provides sufficient proof or not is irrelevant. Due the research yourself.

Tons sit unsold at 3 keys for days and sometimes weeks: http://www.tf2outpost.com/search/45724993

I found 20 or so scarves for 2.5 keys or less.