Keep on droppin' them.

New price: 7-8 keys

Proof:

Sale #1 (2 months)= 8

https://backpack.tf/profiles/76561198054945991#!/compare/1525996800/1526083200

Sold for 8 keys.

Sale #2 (fresh)= invalid

https://backpack.tf/profiles/76561198262354524#!/compare/1530489600/1530576000

Bulk.

bot.tf sales:

https://bot.tf/stats/item?def=1119&q=5&ef=Spectral+Swirl&craft=1&aus=0&ks=0

https://imgur.com/a/ifcFB60

https://backpack.tf/profiles/76561198344933095#!/compare/1523916000/1524002400 - 7 keys 12 ref = ~7.5

https://backpack.tf/profiles/76561198312583107#!/compare/1524002400/1524088800 - 7 keys 14 ref = ~7.5

https://backpack.tf/profiles/76561198394877897#!/compare/1526421600/1526508000 - 8

https://backpack.tf/profiles/76561198358932637#!/compare/1526594400/1526680800 - 8

https://backpack.tf/profiles/76561198312583107#!/compare/1527285600/1527372000 - 7 keys 14 ref = ~7.5

Marketplace.tf sales:

https://marketplace.tf/items/1119;5;u3014

Sale #1 (2 weeks) Sold for 24.95$. Keys were 1.94$. 24.95 / 1.94 = ~13

Sale #2 (2 weeks) Sold for 8.56$. Keys were 1.94$. 8.56 / 1.94 = ~4.5

Sale #3 (1 week) Sold for 13.99$. Keys were 1.97$. 13.99 / 1.97 = ~7

_________________________________________________________

SUMMARY

Sales:

4.5

7

7.5 x3

8 x3

13

4.5 is low.

13 is high.

Wouldn't call 7 an outlier, even tho it's just a marketplace sale. Makes it a nicer looking range :)

Going with 7-8 keys.

Feel free to add proof to support or counter my new price.