Ok, as a bit of friendly advice? Lead with that next time. "Anyone know the game High Seas Trader" doesn't give us much to work with. That's a question whose answer more or less ends at 'yes' or 'no', and as this is a discussion board, you typically won't get a lot of responses with that.
"I'm looking for a game like High Seas Trader, but with better graphics, does anyone know of something like that", however, gives us a framework to immediately start making suggestions that may or may not scratch that itch.
For instance, after a glance at the wikipedia summary, it occurs to me that
Rebel Galaxy may have a similar trading niche, albeit in a spacefaring setting. I don't know if the setting is a negotiable point for you, however, or if you wanted something a bit more grounded.