Craftable=Uncraftable in the case of tools like this from my understanding.

Uncraft suggestion just accepted: http://backpack.tf/vote/id/557d5f95dea9e9e67a8b45a9

All credit goes to Erupo

Contents of suggestion below:

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buyers:

over 100 BP expander can be sold in this range with bots on trade.tf

http://www.trade.tf/mybots/buyers/Backpack%20Expander

on outpost

http://www.tf2outpost.com/trade/26163741 8.22

http://www.tf2outpost.com/trade/26105180 8.22

http://www.tf2outpost.com/trade/25973550 8.22

http://www.tf2outpost.com/trade/25718725 8.33

http://www.tf2outpost.com/trade/26151847 8.33

http://www.tf2outpost.com/trade/26125561 8.33

http://www.tf2outpost.com/trade/26151944 8.44

http://www.tf2outpost.com/trade/24277980 8.55

http://www.tf2outpost.com/trade/24165257 8.55

http://www.tf2outpost.com/trade/25488439 8.55

http://www.tf2outpost.com/trade/24464617 8.66

http://www.tf2outpost.com/trade/23930266 8.66

http://www.tf2outpost.com/trade/26154079 8.66

sellers:

lower seller is 8.66 on these bots on trade.tf, and it's me. i sold more than 10 expander for 8.66 in less than 1 day (you can check my trade history)

http://www.trade.tf/mybots/sellers/Backpack%20Expander

cheapest is 8.66 even on bp.tf

http://backpack.tf/classifieds/?item=Backpack%20Expander&quality=6&tradable=1&craftable=0

on outpost (these are almost all bp expender sellers i found)

http://www.tf2outpost.com/trade/25475437 8.66

http://www.tf2outpost.com/trade/25718522 8.66

http://www.tf2outpost.com/trade/23323237 8.66

http://www.tf2outpost.com/trade/24165257 8.77

http://www.tf2outpost.com/trade/25488439 8.77

http://www.tf2outpost.com/trade/26154079 8.77

http://www.tf2outpost.com/trade/26151847 8.77

http://www.tf2outpost.com/trade/24464617 8.88

http://www.tf2outpost.com/trade/23930266 9

http://www.tf2outpost.com/trade/23772604 9

http://www.tf2outpost.com/trade/25843068 9

http://www.tf2outpost.com/trade/24277980 9

http://www.tf2outpost.com/trade/25676907 9

http://www.tf2outpost.com/trade/13692445 9.33

http://www.tf2outpost.com/trade/26148865 9.33

http://www.tf2outpost.com/trade/25308403 2 for 1 key (9.55)

http://www.tf2outpost.com/trade/26059434 2 for 1 key

http://www.tf2outpost.com/trade/25387186 2 for 1key

http://www.tf2outpost.com/trade/25985372 2 for 1key

http://www.tf2outpost.com/trade/16728630 2 for 1key

http://www.tf2outpost.com/trade/11992375 2 for 1key

http://www.tf2outpost.com/trade/25507293 2 for 1key

http://www.tf2outpost.com/trade/25664691 2 for 1key

http://www.tf2outpost.com/trade/25991613 2 for 1key

http://www.tf2outpost.com/trade/25971304 2 for 1key

http://www.tf2outpost.com/trade/14464126 10

http://www.tf2outpost.com/trade/26018321 10

http://www.tf2outpost.com/trade/26048994 10 or 2 for 1 key

http://www.tf2outpost.com/trade/26063005 10 or 2 for 1 key

http://www.tf2outpost.com/trade/25751314 12.33