Greyhawk Shieldlands

Good Time Charlie's Trading Post is a good place to sell basic loot items.

The West Fudley Market is a good place to get rid of bulk food, drink, clothing and livestock.

There's a chance that the Barons of Bromley or Fudley would buy weaponry, warhorses or luxury goods in moderate amounts (50% chance to buy up to 500gp of such goods). Baron Rufo is less likely to buy such gear (15% chance, but won't spend more than 100gp at a time).

You can send almost anything to Marcello to be sold on his next trip to one of the nearby cities. There is, of course a 25% service fee, but he does pay in advance.

You can always make the trip to one of the nearby cities yourself.

There is absolutely no market for herbals in Gerk.