30 Days:

https://gyazo.com/4656f86b3358a36e0e00cab83815b312

https://bot.tf/stats/item?def=1067&q=1&ef=&craft=1&aus=0&ks=0

Sold:

1 @ 22 keys, 29.88 ref

1 @ 22 keys, 30.00 ref

Bought:

@ 20 keys, 16.55 ref

1 @ 20 keys, 21.11 ref

1 @ 20 keys, 25.22 ref

https://backpack.tf/item/2937197164

https://backpack.tf/profiles/76561199000043065#!/compare/1586736000/1586822400

21 Keys

Sellers: 22 Keys(1) | 26.51 Keys

Buyers: 20.57 Keys

30 Days:

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

20 Mar - 16 Apr

$40.1 / $1.68 = 23.87 keys

$40.1 / $1.68 = 23.87 keys

$40.1 / $1.68 = 23.87 keys

$44.95 / $1.68 = 26.76 keys

$45 / $1.69 = 26.63 keys

$32.71 / $1.69 = 19.36 keys

$36 / $1.69 = 21.30 keys

$36 / $1.69 = 21.30 keys

$33.53 / $1.69 = 19.84 keys

$40.84 / $1.69 = 24.17 keys

$46.3 / $1.68 = 27.56 keys

$46.3 / $1.68 = 27.56 keys

$46.3 / $1.68 = 27.56 keys

$46.3 / $1.70 = 27.24 keys

$46.77 / $1.71 = 27.35 keys

$46.77 / $1.72 = 27.19 keys

$44.48 / $1.78 = 24.99 keys

$43 / $1.78 = 24.16 keys

Sellers: $40.10(2) | $43.70(1) | $43.75(1) | $169(1)

Buyers: $34.78(1) | $34.73(1) | $34.71(1) | 34.61(1)

30 Days:

https://imgur.com/a/g72dnCA

https://steamcommunity.com/market/listings/440/Genuine%20Grandmaster

https://steamcommunity.com/market/listings/440/Mann%20Co.%20Supply%20Crate%20Key

23 Mar - Apr 19

1. $45.74 / $2.13 = 21.47 Keys

2. $50.69 / $2.15 = 23.57 Keys

3. $68.97 / $2.16 = 31.93 Keys

4. $48.25 / $2.12 = 22.75 Keys

5. $44.21 / $2.22 = 19.91 Keys

6. $47.49 / $2.22 = 21.39 Keys

7. $50.78 / $2.25 = 22.56 Keys

8. $43 / $2.22 = 19.36 Keys

9. $49.27 / $2.22 = 22.19 Keys

10. $49.42 / $2.25 = 21.96 Keys

Sellers: $64.10(1) | $64.36(1) | $67.85(1)

Buyers: $43.59(1) | $43.56(1) | $42.98(1)

All Sales

19.35 | 19.35 | 19.85 | 19.90 | 19.90 | 20.30 | 20.40 | 20.45 | 21 | 21.30 | 21.30 | 21.40 | 21.45 | 21.50 | 22.20 | 22.55 | 22.55 | 22.55 | 22.75 | 23.55 | 23.85 | 23.85 | 23.85 | 24.15 | 24.15 | 25 | 26.65 | 26.75 | 27.20 | 27.25 | 27.35 | 27.55 | 27.55 | 27.55 | 31.95

Usable Sales

21 | 21.30 | 21.30 | 21.40 | 21.45 | 21.50 | 22.20 | 22.55 | 22.55 | 22.55| 22.75

3 sellers below 23 Keys at classified and marketplace