Sale 1:

Untraceable, only 10 keys match

Seller: https://backpack.tf/profiles/76561198049234870#!/compare/1544918400/1545004800

Buyer: https://backpack.tf/profiles/76561198040698408#!/compare/1544832000/1545004800

https://backpack.tf/item/4999691249

I can guarantee it sold for all 13 keys on the buyer’s end, but I can’t prove this.

Sale 2:

Untraceable

Seller: https://backpack.tf/profiles/76561198254620348#!/compare/1544832000/1545004800

Buyer: https://backpack.tf/profiles/76561198049234870#!/compare/1544832000/1544918400

https://backpack.tf/item/4999691249

Sale 3:

Bulk for Kill-a-Watt Vive La France

Seller: https://backpack.tf/profiles/76561198411586881#!/compare/1543104000/1544832000

Buyer: https://backpack.tf/profiles/76561198267364698#!/compare/1544745600/1544832000

https://backpack.tf/item/4999691249

Sale 4:

Bulk for Circling Heart Guadalajara

Seller: https://backpack.tf/profiles/76561198267364698#!/compare/1544745600/1544832000

Buyer: https://backpack.tf/profiles/76561198254620348#!/compare/1544745600/1544832000

https://backpack.tf/item/4999691249

No usable sales, using sellers.

Sellers:

https://i.imgur.com/fMJwkkW.png

https://backpack.tf/item/933801218 - 16 keys, 18 days

https://backpack.tf/item/4999691249 - 16 keys, 17 days

https://backpack.tf/item/346440061 - 20 keys

2 listed at 16 keys, both 2+ weeks unsold.

Going with 16 flat.