Electrifying

https://backpack.tf/item/2186041083 - Whole bunch of gambling

https://backpack.tf/item/2186103202

Sale 1) ?

https://backpack.tf/profiles/76561198162626986#!/compare/1548374400/1550188800

https://backpack.tf/item/2186103202

Sale 2) Sold for 11.3 Keys to a buy order

https://backpack.tf/profiles/76561198348625599#!/compare/1554595200/1554768000

https://backpack.tf/profiles/76561198080179568#!/compare/1554681600/1554768000

https://imgur.com/a/37kLbqI

https://backpack.tf/item/3516439882

Sale 3) Sold + ~1 Key of Items for a Cloud 9 Robo Tyrolean

https://backpack.tf/profiles/76561198184039895#!/compare/1551916800/1552003200

https://backpack.tf/profiles/76561198132586937#!/compare/1551830400/1552176000

Using for the Tyrolean.

Sale 4) ?

https://backpack.tf/profiles/76561198132586937#!/compare/1552176000/1552262400

Sale 5) ?

https://backpack.tf/profiles/76561198002757046#!/compare/1552262400/1552348800

https://backpack.tf/profiles/76561198049295888#!/compare/1552176000/1552348800

Sale 6) ?

https://backpack.tf/profiles/76561198049295888#!/compare/1553126400/1553212800

Sale 7) Sold for a Terror-Watt Toy Soldier + 1 Key

https://backpack.tf/profiles/76561198119634686#!/compare/1553126400/1553212800

https://imgur.com/a/FKmezBS - Capped by the Buyout of 16 Keys

Sale 8) Bulk sale

https://backpack.tf/profiles/76561198312816066#!/compare/1553904000/1553990400

https://backpack.tf/item/1887936703

Sale 9) ?

https://backpack.tf/profiles/76561198372127799#!/compare/1550275200/1550361600

https://backpack.tf/profiles/76561198354979270#!/compare/1549238400/1550361600

Sale 10) Sold for a Bubbling Company Mann + 1 Key

https://backpack.tf/profiles/76561198354979270#!/compare/1550361600/1550448000

https://backpack.tf/profiles/76561198354095813#!/compare/1550361600/1550448000

Using for the Company Mann.

Sale 11) ?

https://backpack.tf/profiles/76561198354095813#!/compare/1550361600/1550448000

https://backpack.tf/profiles/76561198046164644#!/compare/1550275200/1550448000

Sale 12) Sold for a Circling Heart Archer's Sterling

https://backpack.tf/profiles/76561198046164644#!/compare/1550448000/1550793600

This should give the Sterling a price.

Sale 13) Sold for an Orbiting Fire Sky High Fly Guy + Strange Festive Killstreak Huntsman (~8 Keys)

https://backpack.tf/profiles/76561198047819527#!/compare/1551916800/1552003200

https://imgur.com/a/k2WSabN - Capped by the Buyout of 17 Keys

Sale 14) ?

https://backpack.tf/profiles/76561198023672484#!/compare/1552089600/1552176000

https://backpack.tf/profiles/76561198277409359#!/compare/1552348800/1552435200

Sale 15) Sold for 17 Keys

https://backpack.tf/profiles/76561198277409359#!/compare/1552435200/1552521600

https://marketplace.tf/items/184;5;u56 - Sold for $36 when Keys were ~$1.77 each

https://marketplace.tf/items/5021;6/Mann%20Co.%20Supply%20Crate%20Key

36 / 1.77 = 20.33, which rounds to 20 Keys

High outlier.

https://imgur.com/a/lr9Pjwx - Several sellers at 15 Keys rule 19 and 20 high.

https://backpack.tf/item/2186103202

https://backpack.tf/item/3516439882

https://backpack.tf/item/2186041083