Very easy to find for 3.66 ref. This strongbox stuff loves to go down.

Classifieds as of creating suggestion:

9 * 3.66 ref

Outyposty:

3.00 ref http://www.tf2outpost.com/trade/18246559 (Lowered from 3.44 ref)

3.33 ref http://www.tf2outpost.com/trade/18238014

3.33 ref http://www.tf2outpost.com/trade/18245026

3.55 ref http://www.tf2outpost.com/trade/18245348

3.66 ref http://www.tf2outpost.com/trade/18238614

3.66 ref http://www.tf2outpost.com/trade/18216801

3.66 ref http://www.tf2outpost.com/trade/18244378

3.66 ref http://www.tf2outpost.com/trade/18245608

3.66 ref http://www.tf2outpost.com/trade/18220179

3.66 ref http://www.tf2outpost.com/trade/18239346

3.66 ref http://www.tf2outpost.com/trade/18227766

3.66 ref http://www.tf2outpost.com/trade/18237099

3.66 ref http://www.tf2outpost.com/trade/18233691

3.66 ref http://www.tf2outpost.com/trade/18252143

3.66 ref http://www.tf2outpost.com/trade/18173723

3.66 ref http://www.tf2outpost.com/trade/18237396

3.66 ref http://www.tf2outpost.com/trade/18241094

3.66 ref http://www.tf2outpost.com/trade/18251320

Unsolds:

http://www.tf2outpost.com/trade/18232948 4.00 1 day

http://www.tf2outpost.com/trade/18220828 4.00 1 day

http://www.tf2outpost.com/trade/18234569 4.00 1 day

http://www.tf2outpost.com/trade/18198384 4.00 2 days

http://www.tf2outpost.com/trade/18195060 4.00 3 days

http://www.tf2outpost.com/trade/18175539 4.00 3 days

http://www.tf2outpost.com/trade/18183664 4.00 3 days

http://www.tf2outpost.com/trade/18151845 4.00 4 days

http://www.tf2outpost.com/trade/18079191 4.00 1+ week

http://www.tf2outpost.com/trade/18056944 4.00 1+ week

http://www.tf2outpost.com/trade/17944756 4.00 1+ week

http://www.tf2outpost.com/trade/17919670 4.00 2+ weeks

I had to make this suggestion very quickly so I'm sorry if it isn't up to my normal standards :)