Planets around heavy's head isn't good.

1/4 in existence, only a few sales.

Item: https://backpack.tf/item/7851087030

Sale #1

https://backpack.tf/profiles/76561198195933333#!/compare/1602115200/1602201600

https://backpack.tf/profiles/76561198284682772#!/compare/1602028800/1602115200

Bulk sale

Sale #2

https://backpack.tf/profiles/76561198140584551#!/compare/1602374400/1602460800

https://backpack.tf/profiles/76561198195933333#!/compare/1602374400/1602460800

Bulk sale

Sale #3

https://backpack.tf/profiles/76561198140584551#!/compare/1602460800/1602547200

https://backpack.tf/profiles/76561198140584551#!/compare/1602547200/1602633600

Id match: 9351584059

https://backpack.tf/profiles/76561198045187173#!/compare/1602547200/1602633600

Sold for 6 Keys 30 ref, excluding quicksell

Sale #4

https://backpack.tf/profiles/76561198045187173#!/compare/1602720000/1602806400

https://backpack.tf/profiles/76561198195933333#!/compare/1602720000/1602806400

Bulk sale

Sale #5

https://backpack.tf/profiles/76561198195933333#!/compare/1602892800/1602979200

https://backpack.tf/profiles/76561198041964300#!/compare/1583452800/1604361600

Bulk sale

Item: https://backpack.tf/item/3495920447

Sale #6

https://backpack.tf/profiles/76561198207755712#!/compare/1602547200/1602720000

https://backpack.tf/profiles/76561198195933333#!/compare/1602115200/1602201600

Bulk sale

Sale #7

https://backpack.tf/profiles/76561198207755712#!/compare/1602892800/1602979200

https://backpack.tf/profiles/76561198337734785#!/compare/1602892800/1602979200

Sale for 6 keys and 5.11 ref, excluding lower than buyers.

ID match: 9369044430

Sale #8

https://backpack.tf/profiles/76561198107974976#!/compare/1600473600/1604534400

https://backpack.tf/profiles/76561198195933333#!/compare/1602115200/1602201600

Bulk sale

Marketplace sales

13.39/1.87 = 7.11 Keys (Oct 8), rounding to 7 Keys

13.26/1.87 = 7.09 Keys (Oct 15), rounding to 7 Keys

Summary

Sales at

6 Keys and 5.11 ref

6 Keys and 30 ref

7 Keys

7 Keys

Only seller at 7.5 Keys

Conclusion

Going with 7 Keys only, thanks!