The price of goods and services depends on availability and consumer demand. Quality goods that are in great demand will be priced high.
Price also depends on the local merchants.
Stores in a convenient location that offer good service can charge a high price for their goods. Sometimes items that are priced low in one location are very expensive in another. For example, fruit purchased from a local farm will be cheaper than if it must be trucked long distances to a market. The price of goods also depends on the wealth of a community. Work with a small group to find the exchange rate between your currency and the currency the team uses on the Web site.