Also saw this. I think this is more likely to be a sale instead of that: http://backpack.tf/profiles/76561198149175706#!/compare/1489968000/1490486400. I imagine the seller of the 28 traded it for pure and the bakerboy, but quicksold the unu without his BP being scanned and used the pure to buy the aussie GL - but this probably shouldn't be used without any evidence from either party involved.

I can't seem to follow that 31 sale either, as again the histories don't match up with what was supposedly traded for. The only thing valid about this suggestion is the current unsold, but that's too young to warrant a drop alone right now, and there are sales that should be used too - just not the ones used here.