72 it is.

Sale 1

Sold for an Eldritch Hellmet (mini at 52) + 20 keys

http://backpack.tf/profiles/76561198125791160#!/compare/1480723200/1480809600

http://www.tf2outpost.com/trade/28627753 ----- No B/O

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Mini for the Hellmet: Sold for 52 keys

http://backpack.tf/profiles/76561198100921131#!/compare/1478995200/1479081600

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=======> 52 + 20 = 72 keys

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Sale 2

Sold with 7 keys for a Green Confetti Law (outdated at 110)

http://backpack.tf/profiles/76561198100921131#!/compare/1481500800/1481587200

No Outpost trade, but new owner relisted for 80 keys: http://imgur.com/a/nblxf

The Law has needed a drop since forever, and the 3-month unsold at 79 on the Softcap goes against using this sale.

http://www.tf2outpost.com/trade/28507175

=======> Not using

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Sellers

- http://www.tf2outpost.com/trade/28507175 ----- 79 keys for 3 months

- http://imgur.com/a/nblxf ----- 80 keys

Summary

- Sale for 72

Going with 72 keys. Criticism appreciated!