1)Well i bought this bubbling toy soldier with an Australium Tomislav (14*0.9=~13).=13 keys(tomislav was a flat 14 keys at the time of the trade)

Proof: http://imgur.com/2AMJOA9 however i suspect this is an outlier.

2)Sold it for a Orbiting planets desert marauder(21*0.9=~19) + 2 keys = 21 keys

Proof: http://imgur.com/KFv2mfj

3)Bought for $50 through steam. not sure if a cash trade counts towards a suggestion but taking the price of keys to be $1.95

That is approximately 25.5 keys ~25.

http://imgur.com/TAMPUDG Not sure if this is enough proof, I asked him for a screenshot but he didn't want to go through the effort.

4) http://imgur.com/lvLSdXq Well now this guy sold it for just a whole lot of items and for the same reason as above i couldn't get him to provide a screenshot of the trade.

Backpack Before: http://backpack.tf/profiles/76561198071413833?time=1400396400

Backpack After: http://backpack.tf/profiles/76561198071413833?time=1400482800

It was a few too many items to add up and if i started considering the overpay on all the items listed it would just become ridiculous.

But if you read the 6th line of the screenshot of the chat log he said "sold it for about 1 bud in items". At the time of the trade buds were still 18 keys so i will assume that is what the trade was valued at.

I chose not to include the cash trade in the suggestion as there isn't sufficient proof of the trade.

If i have made any mistakes please let me know by posting below.