Hot Blizkrieg Knife (Field-Tested)

Third time is the charm, hopefully. Part of this suggestion (mainly the sales outside of sale 1) are credited to Buck Rampant.

Sale 1:

Sold for an Orbiting Planets Brainiac Hairpiece and a Pool Party.

http://backpack.tf/profiles/76561198017279041?time=1464202863 before

http://backpack.tf/profiles/76561198017279041?time=1464220800 after

Brainiac mini:

Sold for a Steaming Modest Pile of Hat and 5 ref.

http://backpack.tf/profiles/76561198088459363?time=1463702400 before

http://backpack.tf/profiles/76561198088459363?time=1463821469 after

Taking 32 keys for this sale.

Sale 2:

Sold for a Circling Heart Otolaryngologist's Mirror?

http://backpack.tf/profiles/76561198181440027#!/compare/1464307200/1464393600

The Mirror seems to have been swapped for the Hearts Gatsby.

http://backpack.tf/profiles/76561198163667841#!/compare/1464220800/1464393600

Gatsby: http://backpack.tf/item/3829716606

Mirror: http://backpack.tf/item/376224897

This would place the sale at 37 keys.

Sale 3:

Sold on the market for about 28-32 keys?

http://backpack.tf/profiles/76561198038501770#!/compare/1460592000/1460678400

It was more than likely listed on April 12th.

http://backpack.tf/profiles/76561198066065032#!/compare/1460332800/1460419200

Probably not safe to use.

Sale 4:

Sold for a Green Confetti Killer's Kabuto and a Strange Professional Killstreak Original.

http://backpack.tf/profiles/76561198066065032#!/compare/1459296000/1459382400

Sales for the RL are all over the place and are around ~$24-36. Probably not great to use.

Taking 32 keys. 37 is a likely outlier judging by the other three sales, and we have two sales that aren't exactly safe to use.