Over the past while I had the idea to run a gurps campaign centered on the buying selling peddling of goods and occasional delving for the goods from information gathered by exchanging info with other merchants. What kind of stuff would be good to include in such a campaign centered on peddlers trade companies and town to town travel?

For example there would be goblin ambushes of Goblin swindlers trying to upsell subpar though occasionally worthwhile goods at exorbitant prices in quick on the road encounters