I was also working on a suggestion for this... it's not really ready to be priced yet. >.>

Sale #1: This is your 2nd sale.

http://www.tf2outpost.com/trade/25659048

Sold for 29 keys

http://backpack.tf/profiles/76561198041529904?time=1428822000 (April 12th)

http://backpack.tf/profiles/76561198041529904?time=1428994800 (April 14th)

Sold quickly.

Sale #2: This is your 1st sale.

http://www.tf2outpost.com/trade/26026614

Sold for a TF Logo Phantom (29)

http://backpack.tf/profiles/76561198127425902?time=1432364400 (May 23rd)

http://backpack.tf/profiles/76561198127425902?time=1432450800 (May 24th)

B/O was 24 keys

Sold quickly.

Sale #3:

http://i.imgur.com/cOevMi9.png http://i.imgur.com/03xT2Nz.png

Sold for $115 on the market. The range of this sale is ~40-47 keys.

http://backpack.tf/profiles/76561198172064175?time=1431932400 (May 18th)

http://backpack.tf/profiles/76561198172064175?time=1432018800 (May 19th)

http://www.tf2outpost.com/trade/26050008 Seller at 45 was offered 38 keys.