Yeah, I own a few. Back to bump this thing's price again.

These parts are still pretty hard to find. I don't think there are any on bazaar or classifieds at the moment. I'm going with a range because I'm pretty sure most sales are still at 1 ref. The previous two suggestions can provide some more evidence.

My recent trade history with the parts:

http://imgur.com/4gPwpmu

Sold:

http://www.tf2outpost.com/trade/24145740 My trade, sold 4 for 2 ref each

http://www.tf2outpost.com/trade/24141342 Ignored offers of 1, sold for 1.33 ref

http://www.tf2outpost.com/trade/24351666 Sold for 1.22 ref

http://www.tf2outpost.com/trade/24394318 Sold for 1 ref

http://www.tf2outpost.com/trade/24189689 Sold for 1 ref

http://www.tf2outpost.com/trade/24394684 Sold for 0.66 ref

Sellers:

http://www.tf2outpost.com/search/235501318 Selling for 4 ref

Nothing in classifieds at the moment.

http://backpack.tf/classifieds/?item=Strange%20Part%3A%20Medics%20Killed%20That%20Have%20Full%20%C3%9CberCharge

Buyers:

http://www.tf2outpost.com/trade/23777640 My trade, buying for 1.33 ref

http://www.tf2outpost.com/trade/22718076 Buying for 1 ref

http://www.tf2outpost.com/trade/23922563 Buying for bp.tf price

Other buyers are buying for 0.66 ref or less.