Updated with some help from Blaze.

Sale #1 (Mine): http://imgur.com/a/59Fag

- Aces High Viewfinder <--> Sulphurous Noble

- Using Mini below

- 77 keys

Sale #2: http://backpack.tf/profiles/76561198170242226#!/compare/1489449600/1489536000

- Peace Sign Fortunate Son (75) + 5 keys in items <--> Sulphurous Noble

- 80 Keys

Sale #3: http://backpack.tf/profiles/76561198355458687#!/compare/1491004800/1491091200

- TF Logo Boxcar + Planets Bubble pipe for 2 keys <--> Steaming Burglerre + Sulphorous Noble

- Using mini below for Burlerre

- (67.5 + 26) - (2 + 17.5) = 74 Keys

Mini for Burglerre: http://backpack.tf/profiles/76561198087390671#!/compare/1490400000/1490486400

- Steaming Burglerre <--> DBD Metal Billycock

- Going with 17.5

Mini for Viewfinder:

http://www.tf2outpost.com/trade/28815249

http://backpack.tf/profiles/76561197998934095#!/compare/1489276800/1489363200 - sold for Demonflame Grenadier's Softcap + 2 keys + sweets = 79 keys b/o

Classifieds: http://backpack.tf/classifieds?item=Virtual%20Viewfinder&quality=5&tradable=1&craftable=1&australium=-1&particle=59

Screenshot(s) of Classifieds:

http://imgur.com/E3ZeKKI

<Sellers>

73 keys | http://backpack.tf/item/2645726463 | http://backpack.tf/u/76561198112281935 | Listed about 24 hours ago [Bumped]

74 keys | http://backpack.tf/item/4377102489 | http://backpack.tf/u/76561197999873164 | Listed 13 days ago [Bumped]

110 keys | http://backpack.tf/item/2230681388 | http://backpack.tf/u/76561198054241988 | Listed 5 days ago [Bumped]

taking 74-79 keys Credit to Blaze.xTH3RM4Lx for this mini