Marketplace sales:

https://marketplace.tf/items/tf2/30618;5;u3003

Feb 10: 5.8 / 1.78 = 3.3

2x Feb 19: 6.72 / 1.75 = 3.8

Feb 23: 6.59 / 1.77 = 3.7

Feb 26: 7 / 1.77 = 4

March 8: 6.93 / 1.72 = 4

March 15: 8.81 / 1.72 = 5

March 29: 8.81 / 1.69 = 5.2

Buy orders at 5.7 and 5.4$ so 5.8$ is an outlier.

Sales on Bot.tf:

https://bot.tf/stats/item?def=30618&q=5&ef=Holy+Grail&craft=1&aus=0&ks=0

1 @ 4 keys, 29.00 ref 28/01/2020

1 @ 4 keys, 2.00 ref 11/03/2020

1 @ 4 keys, 1.88 ref 23/03/2020

1 @ 4 keys, 10.00 ref 28/03/2020

1 @ 4 keys, 20.00 ref 31/03/2020

Other sales :

1. https://backpack.tf/item/7716082337

https://backpack.tf/profiles/76561198170405755#!/compare/1581552000/1581897600

Sold for a Mega Strike Taunt: The Fubar Fanfare but lower than current buyers so not taking into account.

2. https://backpack.tf/item/7716082337

https://backpack.tf/profiles/76561198175249965#!/compare/1581897600/1582156800

Unusable

3. https://backpack.tf/item/7424216926

https://backpack.tf/profiles/76561198081435158#!/compare/1576195200/1579737600

Unusable

4. https://backpack.tf/item/7310592585

https://backpack.tf/profiles/76561198309563748#!/compare/1584662400/1585353600

Sold for 4 keys 10 ref

5. https://backpack.tf/item/6493287279

https://backpack.tf/profiles/76561198045058583#!/compare/1584489600/1584662400

Unusable

6. https://backpack.tf/item/4759213704

https://backpack.tf/profiles/76561198880479135#!/compare/1578873600/1578960000

SCM

7. https://backpack.tf/item/4509871286

https://backpack.tf/profiles/76561198874677360#!/compare/1584144000/1584230400

Sold for a Holy Grail Taunt: Battin' a Thousand but lower than current buy orders so not taking into account.

8. https://backpack.tf/item/4509871286

https://backpack.tf/profiles/76561198106318531#!/compare/1582416000/1582588800

Unusable

9. https://backpack.tf/item/4417233653

https://backpack.tf/profiles/76561198414515070#!/compare/1578960000/1579392000

Unusable

10. https://backpack.tf/item/4408480651

https://backpack.tf/profiles/76561198262570352#!/compare/1580601600/1580688000

Bulk ?

11. https://backpack.tf/item/4408480651

https://backpack.tf/profiles/76561198414515070#!/compare/1580342400/1580428800

Unusable

12. https://backpack.tf/item/4408480651

https://backpack.tf/profiles/76561198082377587#!/compare/1578268800/1578441600

Unusable

Taking 3.75 to 5 keys as range.

Constructive criticism welcome