https://backpack.tf/profiles/76561198132741569#!/compare/1547942400/1548028800

https://backpack.tf/profiles/76561198129186977#!/compare/1547942400/1548028800

Apparently sold for a (duped) Cloudy Moon Human Cannonball. Seems rather high.

Some sales on the Cannonball

https://backpack.tf/profiles/76561198257905663#!/compare/1546041600/1546128000

https://backpack.tf/profiles/76561198144894883#!/compare/1545955200/1546128000

Going by backpack prices and buy orders on the motif this is atleast 100+

https://backpack.tf/profiles/76561198144894883#!/compare/1545609600/1545955200

https://backpack.tf/profiles/76561198114930628#!/compare/1545868800/1545955200

Sold for a Haunted Ghosts Patriot Peak (slightly outdated at 115)

https://backpack.tf/profiles/76561198114930628#!/compare/1544832000/1544918400

https://backpack.tf/profiles/76561198319549446#!/compare/1544832000/1544918400

Sold for a Burning Flames Modest Metal Pile of Scrap (slightly outdated at 107) + '72 Taunt: Yeti Punch and some sweets. Total is about 115ish as well.

All in all the Cannonball ball sale is probably well above 100 and is definitely an outlier here.