Hello Ladies and Gentlemen, welcome to my first suggestion.

Solds/Adds :

http://www.tf2outpost.com/trade/11120899 - 2.66 ( Had 4 offers saying "added for the Strange Amputator" in the last 2 months.)

http://www.tf2outpost.com/trade/15874666 - 2.66 ( Somebody offered 2.66 yesterday )

http://www.tf2outpost.com/trade/15751471 - 2.33 ( Somebody added him 2 days ago for the amputator)

http://www.tf2outpost.com/trade/14652262 - 2.33 ( Had 3 guys saying "added for amputator" in the last 2 days, 1 week ago somebody offered a Strange Backburner [worth 2.66 ref])

http://www.tf2outpost.com/trade/15890336 - 2.00 ( Had 3 adds for 2 ref in 1 day. )

http://www.tf2outpost.com/trade/15649257 - 2.00 ( Sold 1 for 2 ref and is selling another one for 2 ref when his trade works. )

http://www.tf2outpost.com/trade/15922335 - 2.00 ( Had an add within 9 hours. )

http://www.tf2outpost.com/trade/15828472 - 2.00 ( Wasn't bumped in 4 days and has an add for 2 ref. )

Note that there are only 3 pages on outpost and some Strange Amputators have strange parts.

Only 1 seller in the classifieds, he's selling his for 2.66 refined.

As you see, the new update made the Amputator a really good weapon to have. This is why many people wanted one in the last few days and are willing to go higher than 2 ref.

Comments / Constructive Criticism / Counterproof is always welcome.