Resuggestion of https://backpack.tf/suggestion/5b1824c944325a3ea4379a99

New price: 17-18 keys

Proof:

Sale #1 (2 weeks)= 18 keys

https://marketplace.tf/items/181;5;u62

Sold for 35.99$. Keys were 1.97$ that day. 35.99 / 1.97 = ~18 keys

Sale #2 (3 weeks)= invalid

https://backpack.tf/profiles/76561198403354155#!/compare/1525996800/1526169600

Sold for festivized spec ks australium Stickybomb Launcher

- would need a mini, but wouldn't turn out to be higher than 15, which is lower than buyers.

Sale #3 (3 weeks)= 17 keys

https://backpack.tf/profiles/76561198385940902#!/compare/1526169600/1526256000

Sold for 17 keys.

Seller at 17 and 18.

https://imgur.com/a/0MBPuWB

_________________________________________________________

SUMMARY

Sales:

17

18

Going with 17-18 keys.

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