Hmm not too sure on this one! I was thinking about doing it myself but thought against it. The backpack.tf sellers you have linked are selling @ 16.32 and 16.39 respectively. The outpost seller @ 16 is relatively poorly bumped, quite young for outpost and this item tbh and the could be classed as quickselling. The other outpost seller (16 keys 6 ref) Is now reduced to 16 keys 5 ref which makes it 16.24 keys. All listings on backpack.tf 16.3 keys and under are all young. And sellers on SCM are around 16.8. Personally I think this needs a drop just not this low and obviously there's the 5% rule! Thanks for reading! =)