When people want these, they're willing to pay for them.

http://i.imgur.com/qDPQA3s.png

http://www.tf2outpost.com/trade/9968276 offer of 1.33ref

http://www.tf2outpost.com/trade/9378129 3 people willing to pay 3ref for the tin soldier set

http://www.tf2outpost.com/trade/9861050 offer of 1.88ref, 2ref, 2.44ref for tin soldier set

http://www.tf2outpost.com/trade/6428598 offer of 1key for tin soldier set

http://www.tf2outpost.com/trade/10023128 presumably bought for 1.22ref

http://www.tf2outpost.com/trade/9996011 presumably bought tin soldier set for g.shred alert

If you're worried about the "owns" counter, I actually have 8 of these.