Just going to copy paste it here, makes it a bit easier for the rest :P

Sale 1

Sale #4 -

Stormy 13th VRH (65) + 12 keys sweets

http://backpack.tf/profiles/76561198086948995#!/compare/1487030400/1487116800

Mini on VRH -

Seller for 65 ---> http://www.tf2outpost.com/trade/28559004

Clean ---> http://backpack.tf/item/1249597151

65 + 12 = 77, or 80

Sale 2

Sale #3 -

Duped Misty Tricorn

http://backpack.tf/profiles/76561198055195449#!/compare/1487203200/1487289600

Mini on Tricorn -

Cloudy Jeepcap

http://backpack.tf/profiles/76561198317899386#!/compare/1488067200/1488153600

Cloudy Jeepcap:

Duped Cloudy Moon Grenadier Softcap

http://backpack.tf/profiles/76561198031126990#!/compare/1487289600/1487376000

Sold for a Cloudy Moon Big Elfin Deal (90)

http://backpack.tf/profiles/76561198017911615#!/compare/1487203200/1487289600

Sold with 10 keys for a Steaming Viewfinder. Viewfinder is outdated but I doubt it would turn out lower than 80.

http://imgur.com/a/MKlP4 seller at 70

Seller in the Viewfinder sale had been selling for 74: http://www.tf2outpost.com/trade/28530147

He let his Outpost ad expire, but it's reasonable to believe his price would have remained the same or lowered before it sold.

That, and there's still the current seller asking for 70. I think 70-90 would be a better estimate for the Softcap, meaning both Panama sales here should be valued at 80.

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Basically sales + comments from previous suggestion.

shouldn't this be 77-80? rounding 77 to 80 is quite a large rounding and one could argue 77 rounds to 75