Classifieds: http://backpack.tf/classifieds?item=Virtual%20Reality%20Headset&quality=5&tradable=1&craftable=1&australium=-1&particle=107

Screenshot(s) of Classifieds:

http://imgur.com/Id8Ffrn

<Sellers>

40 keys | http://backpack.tf/item/5219264859 | http://backpack.tf/u/76561198063640894 | Listed 3 days ago [Bumped]

Sold:

http://www.tf2outpost.com/trade/28587941

http://backpack.tf/profiles/76561198156833701#!/compare/1478304000/1478390400

http://backpack.tf/profiles/76561198272707822#!/compare/1478044800/1478390400 - sold for Cloud 9 El Jefe + sweets = 35 keys b/o

Mini's:

Cloud 9 El Jefe:

http://backpack.tf/profiles/76561198043939280#!/compare/1488240000/1488326400 - sold with 13 keys for Purple Energy Flipped Trilby = 45 keys (outlier)

Classifieds: http://backpack.tf/classifieds?item=El%20Jefe&quality=5&tradable=1&craftable=1&australium=-1&particle=58

Screenshot(s) of Classifieds:

http://imgur.com/c3zEwra

<Sellers>

32 keys | http://backpack.tf/item/3306652608 | http://backpack.tf/u/76561198084561978 | Listed a day ago [Bumped]

35 keys | http://backpack.tf/item/1830607709 | http://backpack.tf/u/76561198136883260 | Listed 10 days ago [Bumped]

35 keys | http://backpack.tf/item/2334703586 | http://backpack.tf/u/76561198153794814 | Listed about 3 hours ago

36 keys | http://backpack.tf/item/2497381878 | http://backpack.tf/u/76561198076020691 | Listed 13 days ago [Bumped]

taking 35 keys