There's already a channel on Union that is used for salvage trading. It's called 'Union Leaders' and has a leader from most of the SG/VG's in game on there and has been running for close to a year now.
Last time I looked, it was over 100 members and salvage trading is done on there quite regularly. There's a link below if you'd like details on how to be invited.
Union Leaders
I've created a new channel for Salvage Traders. Full info can be read here:
Link
Everyone is welcome to join.