The madden will be a couple keys lower, but still above 75 so sale 1 will be fine.

https://marketplace.tf/items/381;5;u72 - sold for 119$ which is ~57 keys, this will need a range here.

Planets Hazmat mini: https://backpack.tf/profiles/76561198055617854#!/compare/1486080000/1486166400

100 at most, probably closer to 90 with a new mini on the morning glory aviator.

That would make the other sale here around the 57 key sale as well.

3 sales, one at 57 (pure/cash), another one around 57 (a bit bulky) and one at 75.

It could be argued that 75 keys is an outlier here but I can also see including it since this is a rare hat. I would go 57-75 keys.