We'll provide you with a list of the best places to exchange currency in Phoenix. There's a convenient place to buy or sell currency from dozens of countries: your local National Bank of Arizona branch office.Sections specified herein dated as of. It may be easier to buy the cash in the cash registers rather than collecting all the cash and then restocking the registers with the buyer's cash. Buying a Business in Arizona. Brokers, Pros and cons: Business brokers are a good place to find an Arizona business. Asset Purchase Agreements (APAs) are essential documents for asset sales, but they're far more complex than a simple transaction. A security purchase agreement refers to an agreement under which one buys or sells a security, i.e.