Sale #1

https://backpack.tf/item/7429941042

Genuine Grandmaster + 3 keys

Seller: https://backpack.tf/profiles/76561198080436316#!/compare/1757203200/1758844800 (ID: 16202992829)

Buyer: https://backpack.tf/profiles/76561197999173629#!/compare/1758412800/1758672000

71.5 + 3 = 74.5

Rounding to 75

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grandmaster mini (mp.tf sales from start of august only)

https://marketplace.tf/items/tf2/1067;1

$129.90 / $1.89 = 68.7 (69)

$129.90 / $1.87 = 69.5 (70)

$129.90 / $1.84 = 70.6 (71)

$159.98 / $1.82 = 87.9 (88)

$159.98 / $1.80 = 88.9 (89)

$140.23 / $1.90 = 73.8 (74)

88 and 89 are countered by current sellers

69 - 74 rounds to 71.5

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Current sellers:

$199.99 on mp.tf

Sales: 75

Final price: 75