Monty Bronco

https://backpack.tf/item/4405093574

Sale 1) ?

https://backpack.tf/profiles/76561198024867201#!/compare/1528675200/1528761600

https://backpack.tf/profiles/76561198044766585#!/compare/1528588800/1528675200

https://backpack.tf/item/4438679399

Sale 2) ?

https://backpack.tf/profiles/76561198196727109#!/compare/1530662400/1530748800

https://backpack.tf/profiles/76561198119869340#!/compare/1530576000/1530748800

Sale 3) ?

https://backpack.tf/profiles/76561198119869340#!/compare/1531008000/1531180800

https://backpack.tf/item/4441212175

Sale 4) ?

https://backpack.tf/profiles/76561198109741092#!/compare/1532304000/1532390400

https://backpack.tf/item/4417739769

Sale 5) Bulk for a Miami Nights Nunhood

https://backpack.tf/profiles/76561198105484257#!/compare/1531958400/1532044800

Sale 6) Quicksold for 8 Keys

https://backpack.tf/profiles/76561198041902665#!/compare/1531958400/1532044800

https://backpack.tf/item/6395945399

Sale 7) Sold for a Sulphurous Minnesota Slick

https://backpack.tf/profiles/76561198220198628#!/compare/1528675200/1528761600

This should be used to price that

https://backpack.tf/item/6897623704

Sale 8) ?

https://backpack.tf/profiles/76561198095080813#!/compare/1529107200/1529193600

Sale 9) ?

https://backpack.tf/profiles/76561198168663652#!/compare/1529020800/1529107200

Sale 10) ?

https://backpack.tf/profiles/76561198312583107#!/compare/1529625600/1529712000

https://backpack.tf/profiles/76561198217919145#!/compare/1529625600/1529798400

Sale 11) Sold for a '72 Pool Party

https://backpack.tf/profiles/76561198217919145#!/compare/1529798400/1529884800

Not including this sale, as I think other stuff was involved.

Sale 12) Sold for 11 Keys

https://backpack.tf/profiles/76561198305676157#!/compare/1531180800/1531267200

https://backpack.tf/profiles/76561198127109173#!/compare/1531180800/1531267200

https://backpack.tf/item/5826153772

Sale 13) Sold for 7 Keys

https://backpack.tf/profiles/76561198292156436#!/compare/1533254400/1533340800

Low outlier.

https://marketplace.tf/items/30618;5;u3003 - Sold for $19.99 when Keys were ~$1.95 each and for $19.50 when Keys were ~$1.90 each

19.99 / 1.95 = 10.25, which rounds to 10 Keys

19.5 / 1.9 = 10.26, which rounds to 10 Keys

https://imgur.com/a/ppqrjiF - Young Seller at 9 Keys, 19 Day Seller at 10 Keys, 22 Day Seller at 12 Keys, 4 Day Seller at 15 Keys, and a 3 Month Seller at 18 Keys

https://backpack.tf/item/7009898831

https://backpack.tf/item/4438679399

https://backpack.tf/item/4405093574

https://backpack.tf/item/4407096693

https://backpack.tf/item/6491566348