Messed up my previous suggestions on this because I'm a dingus.

anyways

http://www.tf2outpost.com/trade/12366070

~Has offer of mixed worth about 2 (1 pure and an orb. planets marauder, which is a bit less than 1)

~An offer of a P fetti spartan, about 1.5 in unus

http://www.tf2outpost.com/trade/11946715

~Sold for 3 pure rather fast, but more recent trades show that a price like that would be hard to get now. Still notable.

Dunno if this one is notable, but I bought my Burning Chief for A P. Energy Buto + one of these, was a while ago though. Price for the buto was about 6, and my chief was about 8. Filling the blank, we have a difference of 2, in which the marauder filled.

http://puu.sh/3Bg2E.png

http://puu.sh/3Bg3p.png