— Scrap Auction Sale —

https://scrap.tf/auctions/7ZVQW1 - 5 Keys

Could not find Item History :/

— Unusable Sales —

https://backpack.tf/profiles/76561199085934596#!/compare/1685750400/1686528000 - Untrace

https://backpack.tf/profiles/76561198850121720#!/compare/1685750400/1685836800 - Untrace

Item History - https://backpack.tf/item/12311478998

https://backpack.tf/profiles/76561199026390261#!/compare/1680480000/1680566400 - Too Many Sales

https://backpack.tf/profiles/76561198074932486#!/compare/1648512000/1649116800 - Untrace

https://backpack.tf/profiles/76561198074932486#!/compare/1683417600/1683763200 - Untrace

https://backpack.tf/profiles/76561198311498888#!/compare/1683417600/1683504000 - Untrace

https://backpack.tf/profiles/76561198799601783#!/compare/1683417600/1683504000 - Untrace

https://backpack.tf/profiles/76561198799601783#!/compare/1683504000/1683590400 - Untrace

https://backpack.tf/profiles/76561198091502579#!/compare/1683590400/1683676800 - Bulk

Item History - https://backpack.tf/item/11005234835

— Unusable Marketplace.tf Sale —

Unu Apr 13: 19.99 || Key Apr 19: 2.08 || Total - 9.5

Infernal Grip The Russian Arms Race -

https://marketplace.tf/items/tf2/30843;5;u3103

Mann Co. Supply Crate Key -

https://marketplace.tf/items/tf2/5021;6

— Conclusion —

The sale for $19.99 is Unusable because of the listing for $15.00 on Marketplace.tf and a seller at 6.44 on Backpack.tf Classifieds.

Marketplace.tf Listings - https://imgur.com/a/1uCjtpd

Backpack.tf Classifieds - https://imgur.com/a/FyHH1jn