Did you convert the 100% silver into 1 ton of silver in your refinery?
Additionally, does the station buy silver?
Individual stations do not trade in all commodities; if you'd like to sell silver, try a 'High-Tech' economy.
They need it for their ipods.
Don't matter, station will buy all commodities, just doesn't pay much for goods it don't need.
Don't matter, station will buy all commodities, just doesn't pay much for goods it don't need.