Someone was nice enough to Update the nappers, so I can do this now:

Brigade Mini-suggestion:

http://www.tf2outpost.com/trade/19811848 Sold for Max (3) + Strange PDA (9 keys, 9/17.5 = 0.514... 0.5)

(0.5 * 0.9) + 3 = 3.45 (3.5)

Histories:

http://www.tf2outpost.com/item/440,2604798592,105,5

http://www.tf2outpost.com/item/440,2601833547,162,6

http://www.tf2outpost.com/item/440,2601833394,737,11

http://www.tf2outpost.com/trade/19105911 Sold for PE Nappers (3.85)

3.85 * 0.9 = 3.465 (Rounding to 3.5)

Histories:

http://www.tf2outpost.com/item/440,2604798592,105,5

http://www.tf2outpost.com/item/440,2598234708,248,5

Flat price, sweet. Let it ride.