It should probably be going down too.

Proof:

Selling/Sold @ 4 - 4.66 ref

http://www.tf2outpost.com/trade/11463038 4 ref

http://www.tf2outpost.com/trade/11462645 4 ref

http://www.tf2outpost.com/trade/11458749 4 ref

http://www.tf2outpost.com/trade/11458394 4 ref

http://www.tf2outpost.com/trade/11457689 4 ref

http://www.tf2outpost.com/trade/11457041 4 ref

http://www.tf2outpost.com/trade/11453532 4 ref

http://www.tf2outpost.com/trade/11452119 4 ref

http://www.tf2outpost.com/trade/11451421 4 ref

http://www.tf2outpost.com/trade/11446052 4 ref

http://www.tf2outpost.com/trade/11443056 4 ref

http://www.tf2outpost.com/trade/11447964 4 ref

http://www.tf2outpost.com/trade/11429792 4.33 ref

http://www.tf2outpost.com/trade/11427162 4.33 ref

http://www.tf2outpost.com/trade/11424984 4.33 ref

http://www.tf2outpost.com/trade/11450493 4.33 ref

http://www.tf2outpost.com/trade/11428445 4.33 ref

http://www.tf2outpost.com/trade/11434934 4.33 ref

http://www.tf2outpost.com/trade/11437766 4.33 ref

http://www.tf2outpost.com/trade/11437030 4.33 ref

http://www.tf2outpost.com/trade/11435880 4.33 ref

http://www.tf2outpost.com/trade/11443268 4.33 ref

http://www.tf2outpost.com/trade/11442822 4.33 ref

http://www.tf2outpost.com/trade/11458769 4.33 ref

http://www.tf2outpost.com/trade/11450419 4.33 ref

http://www.tf2outpost.com/trade/11446915 4.33 ref

http://www.tf2outpost.com/trade/11452355 4.33 ref

http://www.tf2outpost.com/trade/11450030 4.33 ref

http://www.tf2outpost.com/trade/11455501 4.33 ref

http://www.tf2outpost.com/trade/11449574 4.33 ref

http://www.tf2outpost.com/trade/11454767 4.33 ref

http://www.tf2outpost.com/trade/11451429 4.33 ref

http://www.tf2outpost.com/trade/11422667 4.33 ref

http://www.tf2outpost.com/trade/11453905 4.33 ref

http://www.tf2outpost.com/trade/11460165 4.66 ref

http://www.tf2outpost.com/trade/11410825 4.66 ref b/o

http://www.tf2outpost.com/trade/11424449 4.66 ref

http://backpack.tf/classifieds/search/Mecha-Medes 1 @ 4 ref, 1 @ 4.22 ref, 1 @ 4.33 ref, 2 @ 4.66 ref

Unsold @ 4.77 - 5 Ref

http://www.tf2outpost.com/trade/11378526 5 ref

http://www.tf2outpost.com/trade/11399944 5 ref

http://www.tf2outpost.com/trade/11404483 5 ref

http://www.tf2outpost.com/trade/11225342 5 ref

http://www.tf2outpost.com/trade/11436720 5 ref

http://www.tf2outpost.com/trade/11463354 5 ref

http://www.tf2outpost.com/trade/11387193

Unsold @ 1 Key ('cuz some people tend to do it since it's just a few scrap, this can be considered irrelevant too of course)

http://www.tf2outpost.com/trade/11250893

http://www.tf2outpost.com/trade/11431535

http://www.tf2outpost.com/trade/11397412

http://www.tf2outpost.com/trade/11270223

http://www.tf2outpost.com/trade/11333844

http://www.tf2outpost.com/trade/11377235

http://www.tf2outpost.com/trade/11384549

http://www.tf2outpost.com/trade/11251519

http://www.tf2outpost.com/trade/11439011 2x