Middleman Service
Middlemanning is a service invented to prevent scams involving trades outside of the trade window by eliminating the issue of one person going first and putting all of their faith in the other person delivering. It can only be done if there's something to hold onto, like a game gift (holdable) for a game key (unholdable/intangible). So as such no key for keys or any similar intangible to intangible can be helped by definition. So, with that explained, you can always add us and we will give you best middleman service.

*Note if we are busy we won't be able to help you, afterall we are doing this for free.