Is that what they wanted, or did they actually sell for that? Previous price was originally 1.3 buds ( http://backpack.tf/stats/101/5/36 ), so you're raising the price based on buyouts if none of those actually sold.

http://forums.backpack.tf/index.php?/topic/4350-another-new-rule-regarding-unusual-suggestions-use-original-suggested-values/

http://www.tf2outpost.com/trade/15066028 - tyrolean for blizz medic cap (1.4-1.5, old price)

There's no definitive proof that the hat did sell for the BO prices of 29 and 28 keys, and so your high end is not supported.