Thanks to Pixxious and Beaser for their info.

Sale 1:

https://backpack.tf/profiles/76561198139831684#!/compare/1519084800/1519171200

Sold with 16 ref for 42 keys.

Sold within the day.

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Sale 2:

https://backpack.tf/profiles/76561198139831684#!/compare/1519257600/1519344000

https://backpack.tf/profiles/76561198101162889#!/compare/1518652800/1519344000

Sold for FN Pro KS Hazard Powerjack + GBH Connoisseur's Cap

Powerjack sold for 26 pure within 4 hours.

https://backpack.tf/profiles/76561198055622215#!/compare/1519257600/1519344000

Cap sold for 37 pure in the same amount of time.

https://backpack.tf/profiles/76561198155420824#!/compare/1519257600/1519344000

Total is 63 keys. Using as this as quickness points to this being what the Seller expected to get.

http://www.tf2outpost.com/trade/29565783

B/0 of 48 keys pure, so capping at that.

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Last sale, according to Pixxious, was a buy order sale. Not usable.

Taking 48 keys flat.