So you need to round to the closest .5 I guess

Marketplace Sales:

$13/1.89* = 6.9

$5.11/1.89* = 2.7

$14.75/1.96* = 7.5

$6.12/1.89 = 3.2

$9.89/1.89 = 5.2

$9.98 /1.89 = 5.3

$9.99/1.89 = 5.3

$11.73/1.89 = 6.2

$12/1.89 = 6.4

* = Unsure about price

Sale 1: 6 Keys (Probably)

https://backpack.tf/profiles/76561198264145820#!/compare/1530230400/1530921600

https://backpack.tf/profiles/76561198011321852#!/compare/1530835200/1530921600

Sale 2: Alt Trade?

https://backpack.tf/profiles/76561198384349249#!/compare/1531440000/1532044800

https://backpack.tf/profiles/76561198255288777#!/compare/1532304000/1532563200

Sale 3: Broker/Alt

https://backpack.tf/profiles/76561198255288777#!/compare/1533427200/1533686400

https://backpack.tf/profiles/76561198050487099#!/compare/1533427200/1533686400

Buyers:

x4 3.45 (1,6,7,7 Days Old)

Marketplace X2 2.7 Keys

Unsolds:

6.6 (8 Days)

6.6 (10 Days)

10 (1 Day)

10.6 (1 Year)

12 (2 Months)

12 (2 Months)

12 (3 Months)

Histories:

https://backpack.tf/item/6132936219 (Inactive)

https://backpack.tf/item/5381858844

https://backpack.tf/item/3978750821 (First)

https://backpack.tf/item/3831340197 (Inactive)

https://backpack.tf/item/2691663408 (Inactive)

https://backpack.tf/item/2728982710 (Inactive)

https://backpack.tf/item/5348670429

https://backpack.tf/item/6949047198

Total Sales:

2: 7

3: 2

5: 2, 3, 3

6: 0, 2, 4, 9

7: 5

Just gonna go round to a range of 5-6.5 I guess

Probably missed a couple of sales/histories