I am researching and planning to do a retail gross margin game. Ideally, I want to have it take place inside a mall -- 4 to 5 players max. Each player runs their own store for a full "fiscal" year. Money is earned by driving sells for higher gross margin items (ie: a product that is $5 to make and sells for $35 has a 700% markup and generates more profit than, say, a $15 product that sells for $25 and has a markup of only 67% (Buy low -- sell high). Each player will construct their store in the mall where they feel that it will generate the most business and pull in the most customers.
Anyway, I would like some feedback on what type of game mechanics would suit this style of game. I kind of like "Puerto Rico"'s mechanics and "Princes of Florence", as well as "Union Pacific"'s. Any suggestions would be great. Also, I would like to integrate the use of a card system into it somehow, if possible.
if you'd like to use cards.. how about if each share of a particular commodity was represented by a card, and the value of each commodity fluctuated based on the number of cards held by shop owners. for example, each commodity could have a row of cards (on the table), which players dip into when they purchase. each commodity's value could be equal to the number of cards left on the table. hence, the more stores selling a thing, the less valuable it becomes.
just a idea off the top of my head, but it seems an easy mechanism for supply and demand.