Keep calm and read the proof. :)

*DISCLAIMER*

It's a 2 month old price and I have checked Outpost how it went. Most people want 1 key or 3.33 ref, but no less. There is a bit of a difference, but no less, let me show. :)

*UNSOLD*

http://www.tf2outpost.com/trade/8455539 ( Unsold for 1 day at X price, mostly taking offers )

http://www.tf2outpost.com/trade/8464632 ( Unsold for 1 day at high end of backpack.tf price = 2.66 )

http://www.tf2outpost.com/trade/8447564 ( Unsold for 2 days at 2.66 ref )

http://www.tf2outpost.com/trade/7779177 ( Unsold for 4 weeks at X price, has recevied many 2.66 ref offers, but no takers )

Note: http://www.tf2outpost.com/trade/6288474

( Unsold for 2 months, have received many offers, like 2.66 ref AND 3 ref, yet, it remains unsold )

*SOLD/SELLING*

http://www.tf2outpost.com/trade/8455299 ( Selling it for 2.66 ref and it is sold, he doesn't have it )

http://www.tf2outpost.com/trade/8486488 ( Selling beak for 2 ref, a buyer has added him )

http://www.tf2outpost.com/trade/7127316 ( Selling for 3 ref and people are saying add me, yet, it remains unsold )

Note: http://www.tf2outpost.com/trade/6916220 ( Unsold for 1 month, has received a 3 ref offer, yet, it's unsold )

*BUYING*

http://www.tf2outpost.com/trade/8490532 ( Buying for 3 ref )

http://www.tf2outpost.com/trade/8467162 ( Buying for 2.66 ref )

http://www.tf2outpost.com/trade/8484394 ( Buying for 2.66 ref )

Conclusion: People are selling them for 2.66 - 3 ref and people are willing to offer and pay 2.66 - 3 ref.

Extra note: If this suggestion isn't good ( mostly the 3 ref area ) then 2.66 ref would be enough.