What is ona'ah? What are its guidelines?
How is the "fair market price" determined?
How is the "fair market price" determined in a free market for an ona'ah claim?
I rented a house for $6,000 a month. It later became clear that I was swindled and comparable rentals in the area are not worth more than $4,000. Can I claim ona'ah and demand a refund or annul the rental? What about a car rental?
A car mechanic charged me rates way out of line with other mechanics in his area. Can I claim ona'ah and demand a refund of the unfair price?
I sold a work of art to a collector for $50,000 and found out later that I could have easily sold it for $75,000. Can I claim ona'ah and revoke the sale because of the unfair price?