Domain

LocalStockExchanges.com:  we are selling this natural language, easy to remember and pronounce URL that conveys the meaning of a site in no uncertain terms.

Overview

Stock Exchanges, in totality, are a huge business segment.  Local Stock Exchanges can drill up or down into the vertical, depending on your preference.  

Local businesses that are public can be folded into the site as a type of index.  Another approach is to allow smaller local businesses to "go public" on the platform, which could allow those businesses to raise funds, promote themselves and more.  Memberships, annual listing fees, affiliates and advertising earnings would be main revenue drivers.