Thought these needed a update from a 2 month old price, because It was hard for me to find one for 2.77 or lower.

Many Fishcakes are also being sold in sets.

Proof:

http://i48.tinypic.com/501dzd.png

- My trade, Bought for 2.88

http://www.tf2outpost.com/trade/6605497

- Łмα™To0a [NO SOUND] offered 3 Ref then changed to 1 Key

http://www.tf2outpost.com/trade/7950931

- Sold many for a Key, Rejected offer of 3 Ref and Sweets

http://www.tf2outpost.com/trade/8997359

- Offer of 3 Ref, but Owner wants 4.33

Where did I get my suggested Price range from?

Well 70% of a Key (4.11) is 2.877 which is what I got it for + The high price is what others are successfully selling them at.