Note: I own one of these.

Please let me know if I did anything wrong. Feedback is appreciated.

Sales:

http://www.tf2outpost.com/trade/14455534

Check the comments and item histories.

Green Black Hole Broadband Bonnet (2.2-2.6 buds) + 7 keys (0.33 buds)

Overpay: 2.4 * 0.9 = 2.16

2.16 + 0.33 = ~2.5 buds

http://www.tf2outpost.com/trade/14454921

No offers in the comments, but item histories show the sale.

Searing Plasma Pyromancer’s Mask (1.5-1.8 buds) + Strange Festive Buff Banner (4.5-5 keys, .226 buds) + Strange Festive Holy Mackerel (4 keys, .19 buds) + Strange Festive Frontier Justice (3.5-4 keys, .178 buds) + Strange Festive Ubersaw (3.5-4 keys, .178 buds)

Overpay: 1.65 * 0.9 = 1.485

1.485 + .226 + .19 + .178 + .178 = ~2.25 buds

http://www.tf2outpost.com/trade/14456144

Item history shows the sale.

http://imgur.com/UfKl6st

Dead Presidents Respectless Rubber Glove (1.7-1.9 buds) + Strange Festive Huntsman (13 keys, ~0.62 buds)

Overpay: 1.8 * 0.9 = 1.62

1.62 + .62 = ~2.24 buds

http://www.tf2outpost.com/trade/14476724

No evidence in the comments, but item history shows the sale..

Sold for Anti-Freeze Helmet Without a Home (currently unpriced)

Added: 6 keys (.29 keys) + Stormy Storm Berliner’s Bucket Helm (1-1.2 buds)

Sellers:

http://www.tf2outpost.com/trade/14497632

B/O 2.5 buds