Proof below. Overpay calculated. Original prices used

Sales

http://www.tf2outpost.com/trade/18450939

http://backpack.tf/profiles/76561198041319164?time=1394352000 ---> http://backpack.tf/profiles/76561198041319164?time=1394521200

Bubbling Drill, added about 5 keys in items = 15 keys (No overpay since offered on)

http://backpack.tf/profiles/76561198041319164?time=1396422000 ---> http://backpack.tf/profiles/76561198041319164?time=1396681200

Steaming Madame + ~3 keys-ish? = 15 keys (Outdated, but shouldn't really matter on such a low-tier)

http://www.tf2outpost.com/trade/18412679 - Added a key for a Bubbling Bombing Run = 14 keys (No overpay since offered & same reason as above)

http://www.tf2outpost.com/item/440,2345706118,30007,5 ---> http://www.tf2outpost.com/item/440,2352681933,30128,5

NnB Belgian = 15 keys

Help / Constructive Criticism / Additional Proof / Counter-Proof is ALWAYS welcome! >;3