Here's the rule for bargains: Do other men, for they would do you. That's the true business precept.
Source: Jonas Chuzzlewit, in Martin Chuzzlewit, ch. 11 (1844).
-- Charles Dickens, (Feb 7 1812-1870), English novelist, dramatist; He was one of most prolific and popular English novelists, e.g., A Christmas Carol, 1843 & Tale of Two Cities, 1859.