I felt that this hat was undervalued, but didn't make a suggestion because I was selling one and there'll be a conflict of interest.

My trade: http://www.tf2outpost.com/trade/10553099

Offers received:

2.2 buds (Sold at this price)

2.0 buds (Received this offer twice)

40 keys + sweets

Mordecai: http://www.tf2outpost.com/trade/10028822

Offers received:

Max head (Retracted)

50 keys

1 bud + 10 keys

Error: http://www.tf2outpost.com/trade/9588289

Offers received:

38 keys, or 1.5 buds (Possibly sold for 1 buds + 20 keys)

I had set 1.6 buds as the low value because: (1) it is the current upper bound; (2) I received an offer of 40 keys.

High value is set as 2.2 because: (1) I sold mine at that price; (2) Mordecai received offers comparable to that.