2 month old price.

Looks like the upper end isn't possible anymore. I just sold two of these in the last 2 days.

Proof:

http://www.tf2outpost.com/trade/13545999

First one sold for: BaF Searing Engineer Cap (1.2 - 1.4 buds) + 4 ref in hats (26 keys with overpay).

Second one sold for: Lvl 69 Earbuds + 5 keys + 1.5 keys in items (28 keys with overpay)

http://www.tf2outpost.com/trade/13581696

Sold for 1 bud + 4 keys ( 26 keys)

http://imgur.com/kyTxYTC

Bought 24 keys

No other noteable trades/offers.

29-30 doesn't seem possible anymore.