Buying An Existing Franchise

franchise
A business or service given such authorization to operate
An authorization granted by a government or company to an individual or group enabling them to carry out specified commercial activities, e.g., providing a broadcasting service or acting as an agent for a company's products
An authorization given by a league to own a sports team
an authorization to sell a company's goods or services in a particular place
grant a franchise to
a statutory right or privilege granted to a person or group by a government (especially the rights of citizenship and the right to vote)

existing
In existence or operation at the time under consideration; current
existent: having existence or being or actuality; "an attempt to refine the existent machinery to make it more efficient"; "much of the beluga caviar existing in the world is found in the Soviet Union and Iran"
presently existing; "the existing system"
In common usage, existence is the world we are aware of through our senses, and that persists independently without them.

buying
the act of buying; "buying and selling fill their days"; "shrewd purchasing requires considerable knowledge"
(buy) obtain by purchase; acquire by means of a financial transaction; "The family purchased a new car"; "The conglomerate acquired a new company"; "She buys for the big department store"
(buy) bargain: an advantageous purchase; "she got a bargain at the auction"; "the stock was a real buy at that price"
Obtain in exchange for payment
Procure the loyalty and support of (someone) by bribery
Pay someone to give up an ownership, interest, or share