20% {Ans: What is the minimum percentage of profit from sales a business owner should plan to make from each sale?}Blue Book of Gun Values {Ans: Anyone who buys, sells, trades, appraises, or repairs guns should have Gun Trader's Guide, Antique Firearms: The Collector's Guide, and which of the following:}The Condition of the Firearm {Ans: One of the most important factors in determining the value of a firearm is which of the following:}Referrals from Existing Customers {Ans: One of the best sources of new customers is which of the following:}Service {Ans: What can make the difference between success and failure of a business?}Fair {Ans: A gun that is described as follows: "In safe working condition, but well worn, perhaps requiring replacement of minor parts or adjustments that should be indicated in advertisement" - is which of the following condition standards:}