Heavily outdated

Only 2 recent usable sales-

Sale 1:

Sold for a Mallard Pith Helm and a Lime Bill's = 42 keys(?)

No overpay since it was offered: http://www.tf2outpost.com/trade/25143587

http://backpack.tf/profiles/76561198058881784?time=1425196800 (March 1st)

http://backpack.tf/profiles/76561198058881784?time=1425283200 (March 2nd)

B/O of 50 keys

Sale 2:

Sold for 40 keys

http://backpack.tf/profiles/76561198012827083?time=1429340400 (April 18th)

http://backpack.tf/profiles/76561198012827083?time=1429426800 (April 19th)

B/O of 4 buds (Back when buds were ~10 keys, closed before sale)

Just going with 40 keys since recent sales for the pith haven't been nearly that much