Next game up for auction is Seven Cities of Gold. I used to enjoy this one as a kid. As an adult, nostalgia drove the purchase for this.
I recently played a game on my Sharp X1 called Uncharted Waters (大航海時代) and it reminds me a bit of this game. You make preparations for a journey from your home country in search of fortune overseas.
When you find new territory, you can try to barter with the natives or colonize the area. The goal is to return with more gold. When you go back to your home country, you can visit your home and see a visual map of what areas you have discovered.