(noun) Trade; traffic; chaffer; chaffering.
"That man is the richest whose pleasures are the cheapest."
"The happiness of credulity is a cheap and dangerous quality of happiness, and by no means a necessity of life."
"Freedom has cost too much blood and agony to be relinquished at the cheap price of rhetoric."
"Words are cheap. The biggest thing you can say is elephant."
"There is nothing cheaper than an opinion."
"Never buy a thing you do not want, because it is cheap, it will be dear to you."