Here are the sales I was able to track down from the last 3 months. Let me know if you can get others.

Sold for a Vivid Plasma Smoking Skid Lid (75) | 75

http://backpack.tf/profiles/76561198095862827#!/compare/1490140800/1490227200

Sold + 3 Keys for a Burning Brain Bucket (64) | 61

http://backpack.tf/profiles/76561198095862827#!/compare/1489795200/1490140800

Sold + Fountain of Delight Buy a Life (May need a mini, I did this trade and we valued it around 40) + Amaranthine Base Metal Billycock (Current price suggestion at 40, likely to pass) for a Burning Berlin Brain Bowl (142.5). In total, the hat was valued around 62.5 in this trade | 62.5

http://backpack.tf/profiles/76561198182691009#!/compare/1489795200/1489881600

Sold for GE Desert Maurauder (63) | 63

http://backpack.tf/profiles/76561198048468138#!/compare/1487116800/1487203200

Overall: 75, 61, 62.5, 63

The 75 appears to be an outlier, pricing at 61-63. All constructive criticism is appreciated.