Identify silver first
PC Gamer says silver contraband is marked by a white chalice icon. Ordinary vendors may buy low-value loot, but its guide reports that silver needs a specific buyer.
Economy
How to Sell Silver Contraband
The source-verified quest gate and vendor for silver items.
According to the source, complete Into the Den, which begins east of Northern Foothill, then travel to Svartrau City’s Neustadt District and speak to the Silver Trader. The source says attempting to visit before the prerequisite produces no trade option.
Keep the route simple
Check the item icon, finish the prerequisite, and only then make the trip to the trader. This draft avoids unverified price or profit claims.