Making full use of the 3 months limit.

New price: 17-21 keys

Proof:

Sale #1 (1 month)= invalid

https://backpack.tf/profiles/76561197996095002#!/compare/1525737600/1525824000

Sold with a p confetti tartan tyrolean for a blizzardy mining light + 2 keys sweets. Used there.

Sale #2 (1 month)= 21 keys

https://backpack.tf/profiles/76561198305578110#!/compare/1525824000/1525910400

Sold with the schadenfreude taunt (27 ref) for a duped blizzardy mining light (22) = ~21. Mini below.

Sale #3 (1 month)= invalid

https://backpack.tf/profiles/76561198079578383#!/compare/1527206400/1527292800

Sold for starstorm slumber bombing past (11) + orb fire big country. Mini for the bombing past below. No valid sales for a mini on the big country.

Sale #4 (2 weeks)= 10 keys

https://backpack.tf/profiles/76561198019955508#!/compare/1528761600/1529971200

Sold with a vintage bills hat (10) and a strange aloha apparel (1.6) for a mystery to everyone smoking sombrero (22)= 10.4. Rounding to 10. Poor Bill.

Sale #5 (3 months)= 17 keys

https://backpack.tf/profiles/76561198385940902#!/compare/1522706400/1522792800

Sold for 17 keys.

Sale #6 (3 months)= 20 keys

seller: https://backpack.tf/profiles/76561198272299050#!/compare/1522195200/1524096000

buyer: https://backpack.tf/profiles/76561198134899613#!/compare/1522195200/1522281600

Sold with a key + ~2 keys sweets for a smoking whirly warrior (21.5) + 1 key = ~20.

With a key for a key?! No usable sales for a mini. Using the back then only 4 month old price.

Sale #7(3 months)= 20 keys

https://backpack.tf/profiles/76561198089026889#!/compare/1520812800/1521849600

Sold for a vivid larrikin robin (19) + 1 key = 20. Mini below.

Sellers at 20 and 22:

https://imgur.com/a/Cv4S1HO

_________________________________________________________

Minis

duped blizzardy mining light:

https://backpack.tf/profiles/76561198305578110#!/compare/1526515200/1526947200

Sold for 22 keys.

Going with 22.

starstorm slumber bombing past:

https://bot.tf/stats/item?def=30807&q=5&ef=Starstorm+Slumber&craft=1&aus=0&ks=0

Bot sales at 10-11 keys

Going with 10.5. Rounding to 11.

vivid larrikin robin:

https://backpack.tf/profiles/76561197996095002#!/compare/1521590400/1521763200

Sold for 19 keys.

Going with 19.

_________________________________________________________

SUMMARY

Sales:

10

17

20 x2

21

10 is low.

Going with 17-21 keys.

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