The first item I suggested.

1 month old price and this hat has gone up quite a bit.

1 of 1 on outpost

http://www.tf2outpost.com/trade/12255380

Accepted a bubbling dragonborn helm (19 keys w/ overpay) but it was sold to someone else for an unknown amount.

http://www.tf2outpost.com/trade/12694848

Sold for a bud, an offer of 27 keys but I'm guessing that that's an outlier/joke because it is above the B/O.

(Read a responce to Bloo | MG's offer in the trade below. =ℐmpure= -Alphadef says he bought it for a bud.)

http://www.tf2outpost.com/trade/13161551

Offers:

1 bud + 1 key + about 1.1-1.2 keys in items (24~ keys total) (thinking about accepting)

Orbiting fire buckaroos hat (13~ keys w/ overpay) + 8 keys (21 keys total)

1 bud if he adds a key or 1:1 with a bud depending on what offers he gets

NnB Milkman (17 keys w/ overpay) + 2 keys (19 keys total)