Summa Theologica

IIa IIae q. 77 : Of Cheating, Which Is Committed In Buying And Selling (Four Articles)

[Letter] [A4] Entire question
[Letter] [A4] 1. Whether it is lawful to sell a thing for more than its worth?
[Letter] [A4] 2. Whether a sale is rendered unlawful through a fault in the thing sold?
[Letter] [A4] 3. Whether the seller is bound to state the defects of the thing sold?
[Letter] [A4] 4. Whether, in trading, it is lawful to sell a thing at a higher price than what was paid for it?