Counter Suggestion.

Classified ads at time of posting:

http://backpack.tf/classifieds/?item=Festive%20Scattergun&quality=11&tradable=1&craftable=1

1*22 keys (Has killstreak and parts)

2*23 keys (1 has specialized killstreak and another has parts)

1*24 keys

1*25 keys (Has killstreak)

Unsolds at 25 keys:

http://www.tf2outpost.com/trade/25517950 (Has killstreak, young)

http://www.tf2outpost.com/trade/25520835 (Young)

http://www.tf2outpost.com/trade/25513178 (Has parts, young)

http://www.tf2outpost.com/trade/25517060 (Has killstreak, parts and a spell, young)

http://www.tf2outpost.com/trade/25327309 (Has parts, 2 weeks)

http://www.tf2outpost.com/trade/25345469 (Has specialized killstreak and parts, 2 weeks, poorly bumped)

http://www.tf2outpost.com/trade/24968123 (1 month, poorly bumped)

Sellers at 3 buds (24 keys):

http://www.tf2outpost.com/trade/25425037 (1 week old)

http://www.tf2outpost.com/trade/25387970 (Has specialized killstreak, parts and a spell, 1 week old)

Seller at 22 keys:

http://www.tf2outpost.com/trade/25519459 (Has killstreak and parts, young)

This is all I could find on Outpost that are valid

Seeing trades mostly at 25 keys are young, I've decided to leave it in the range