Attempt No.3...

The G. Fetti should not be worth more than the Circling TF Logo...

First Unusual Suggestion, go easy on me pls.

I bought Savage's Stove Pipe

http://www.tf2outpost.com/trade/25436418

http://imgur.com/SLNr2pX

For a Circling TF Logo Stove Pipe; I 1:1'd it (worth ~14.4 keys, 90% overpay calculation = 12.96 13 keys)

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Mini on the Stove Pipe

I bought the Circling TF Pipe

http://www.tf2outpost.com/trade/25719083

For a Circling Peace Sign Tavish Crown; I 1:1'd it (worth ~16 keys, 90% overpay calculation = 14.4 keys)

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I sold the G. Fetti Stove Pipe

http://imgur.com/cZXIx1x

For a Circling Hearts Connoisseur's Cap, a Spec KS Festive Minigun, a dirty Sight for Sore Eyes, 1 key pure, and 2 refined.

• Con Cap = 17 keys * 0.9 = 15.3 keys
• Minigun (using average SCM sold price to determine price) = about 1.8 keys
• Sight = .23 keys
• 2 ref = .10 keys
• 1 key pure = 1 key

TOTAL = 18.43 keys

Rounding down gives me 18 keys

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Guy selling his Stove Pipe for 16 keys (pure I presume)

http://www.tf2outpost.com/trade/24325181

Trade's been up for 4 months, still in his inventory

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Guy selling his Stove Pipe (looking for offers)

http://www.tf2outpost.com/trade/25664319

Trade's been up for 3 weeks, still in his inventory

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Conclusion:

Even though I did manage to sell this hunk o' junk for 18 keys, I feel it's safe to consider that to be an outlier. We were both using the outdated price when negotiating the trade, so... Besides, as I showed previously, there is a guy who is still trying to sell his Stove Pipe for 16 keys, and hasn't been able to do it for four months.

I'm new to Unusual suggesting, so I may have made a mistake. If so, feel free to point it out, and I'll get to it.

Any constructive feedback, additional proof and counter proof is welcome. Thanks, and have a nice day!