Classifieds:

http://backpack.tf/classifieds/?item=Festive%20Grenade%20Launcher&quality=11&tradable=1&craftable=1 - (1 at 5.1 keys, 1 at 5.4 keys, 1 at 5.7 keys, 1 at 5.8 keys, 13 at 6 keys)

Sellers at 5.1 keys:

http://www.tf2outpost.com/trade/25048938 - unsold (11 hours)

Sellers at 5.4 keys:

http://www.tf2outpost.com/trade/25041258 - unsold (1 day)

http://www.tf2outpost.com/trade/25031330 - unsold (2 days)

Sellers at 5.7 keys:

http://www.tf2outpost.com/trade/24999869 - unsold (5 days)

Sellers at 5.8 keys:

http://www.tf2outpost.com/trade/24983762 - unsold (6 days)

Sellers at 6 keys:

http://www.tf2outpost.com/trade/25048957 - unsold (11 hours)

http://www.tf2outpost.com/trade/25040693 - unsold (1 day)

http://www.tf2outpost.com/trade/25025016 - unsold (2 days)

http://www.tf2outpost.com/trade/25028801 - unsold (2 days)

http://www.tf2outpost.com/trade/25015513 - unsold (3 days)

http://www.tf2outpost.com/trade/25010641 - unsold (4 days)

http://www.tf2outpost.com/trade/25005312 - unsold (4 days)

http://www.tf2outpost.com/trade/24995645 - unsold (5 days)

http://www.tf2outpost.com/trade/24993358 - unsold (5 days)

http://www.tf2outpost.com/trade/24996986 - unsold (5 days)

http://www.tf2outpost.com/trade/24993990 - unsold (5 days)

http://www.tf2outpost.com/trade/24988596 - unsold (6 days)

http://www.tf2outpost.com/trade/24983315 - unsold (6 days)

http://www.tf2outpost.com/trade/24971734 - unsold (1 week)

http://www.tf2outpost.com/trade/24933241 - unsold (1 week)

http://www.tf2outpost.com/trade/24913001 - unsold (1 week)

http://www.tf2outpost.com/trade/24970769 - unsold (1 week)

http://www.tf2outpost.com/trade/24964497 - unsold (1 week)

http://www.tf2outpost.com/trade/24819165 - unsold (2 weeks)

http://www.tf2outpost.com/trade/24797784 - unsold (2 weeks)

http://www.tf2outpost.com/trade/24719564 - unsold (3 weeks)

http://www.tf2outpost.com/trade/24701118 - unsold (3 weeks)

http://www.tf2outpost.com/trade/24754917 - unsold (3 weeks)

http://www.tf2outpost.com/trade/24668762 - unsold (4 weeks)

http://www.tf2outpost.com/trade/24236072 - unsold (1 month)

http://www.tf2outpost.com/trade/24509187 - unsold (1 month)

http://www.tf2outpost.com/trade/23745725 - unsold (2 months)