Just got this from the loot I got out of completing the Mecha Engine tour

Classified ads at the time of posting:

Page 1 - http://m.imgur.com/E7ifSeM

Page 2 - http://m.imgur.com/SCaH5R1

http://backpack.tf/classifieds?item=Silver+Botkiller+Rocket+Launcher+Mk.II&quality=11&tradable=1&craftable=1

1*5 refined

2*5.33 refined

2*5.38 refined

2*5.66 refined

1*5.88 refined

7*6 refined (1 has parts attached)

Unsolds at 6 refined:

http://www.tf2outpost.com/trade/27321841 (~3 days)

http://www.tf2outpost.com/trade/27334972 (Young)

http://www.tf2outpost.com/trade/27295375 (~1 week)

http://www.tf2outpost.com/trade/27297936 (~6 days, poorly bumped)

Unsold at 5.7 refined:

http://www.tf2outpost.com/trade/27320302 (~3 days, never bumped)

Unsolds at 5.66 refined:

http://www.tf2outpost.com/trade/27316990 (~4 days, never bumped)

http://www.tf2outpost.com/trade/27293605 (~1 week, never bumped)

Unsolds at Backpack tf price:

http://www.tf2outpost.com/trade/27268895 (~1 week)

http://www.tf2outpost.com/trade/27336776 (Young)

http://www.tf2outpost.com/trade/26989814 (~1 month)

http://www.tf2outpost.com/trade/27304923 (~5 days)

Seller at 5.33 refined:

http://www.tf2outpost.com/trade/27296428 (~6 days old, poorly bumped)

Sellers at 5 refined:

http://www.tf2outpost.com/trade/26590389 (~3 months old)

http://www.tf2outpost.com/trade/27299562 (~6 days old, poorly bumped)

This is all I could find on Outpost that are valid at the time of posting this suggestion.