Don’t the copper fed and silver fed salvage-o-matics function identically? The wiki seems to think so.
They are basically infinite use salvage kits.
Copper fed is same quality as basic and costs 3c per use. Basic kits cost 3.5c per use.
Silver fed is same quality as master and costs 60c per use. Master kits cost 61c per use. Mystic kits cost 10c per use (disregarding cost of mystic forge stones)