the system works as follows:
You have a main store (licensed) and a number N of "sister" stores (each one requires a separate license). In the extra product fields of products in the main store, you can input tagged data - like a different price or different drop-down options, etc.
Then, a separate module is run which takes the data from the main store and populates the database of the sister store(s); thus, if you specified a lower price for a particular price in the extra product fields, the item shows up in the new store at the lower price.
I footed the development cost of this system; if SS makes it available to you, enjoy it