The first link is a 2 month old sale.

1st link: As a previous comment said, 2 months old.

2nd link: If you say 2 buds is an outlier, why include it in the price range?(or or are you referring to the third link? I think I might have misunderstood)

3rd link looks alright, though the guy offering the fez seems a little inexperienced to be offering a bud unusual and a nearly 2 bud unusual for the same thing.

Also, being that there's 30 of these out there, is it possible to add any more proof?

All 2 buds b/os.~

http://www.tf2outpost.com/trade/12566289

http://www.tf2outpost.com/trade/13284417

http://www.tf2outpost.com/trade/12885509

http://www.tf2outpost.com/trade/13082689

Also this hat is way to common that 3 trades can make a new price imo. Coudln't you find more?

http://www.tf2outpost.com/trade/12149458 - set was sold for overclocked fez (1.9-2.3)

http://www.tf2outpost.com/trade/12566289 - was interested in smoking stahlhelm (1.5-2) + maybe the v.mask

I'm not too sure, maybe the low price shouldn't be as high as you have suggested.