Proof below. Overpay calculated

7 months old price, recently sold this, so lets fix the price :D

Sold mine for ( http://imgur.com/RAXQeuR,5SbmYYq#0 (two images)): 19 keys + Pink Brotherhood (about 1.8 keys-ish) + Pink Nightmare (4 ref-ish) = ~21 keys (rounded off)

Offers

http://www.tf2outpost.com/trade/12914162:

Stormy Storm Brain Bucket (18.45 keys)

Orb Planet Bloke's + 6 keys (19 keys)

Sales

http://www.tf2outpost.com/trade/12944702 - 1 bud

http://www.tf2outpost.com/trade/13713310 - Steaming Gatsby + ~5 keys - ~19.4 keys

http://www.tf2outpost.com/trade/10009706 - 1 bud (3 months old, does this count...?)

B/O's (that could make a difference)

http://www.tf2outpost.com/trade/13684091 - 1 bud

http://www.tf2outpost.com/trade/13809982 - 22 keys

http://www.tf2outpost.com/trade/12914162 - Bud

http://www.tf2outpost.com/trade/13819926 - 20 keys

Conclusion

This is all the proof if I can find. Price based on lowest sale and highest sale to cover the sales which I found proof for.

Help / Consturctive Criticisim / Additional Proof / Counter-Proof is ALWAYS welcome! :D