[Lurking Libertarian]

How much should they have sold it for in order not to be considered greedy bad people in the Lord’s eyes?

I don't claim to speak for the Lord, but a sale at less than fair market value is considered fraudulent under the Uniform Fraudulent Conveyance Act.

[Rebelbase]

“I don’t claim to speak for the Lord, but a sale at less than fair market value is considered fraudulent under the Uniform Fraudulent Conveyance Act. “

There are plenty of honest Real Estate transactions every day that sell well below fair market value. The act you cited must be confined to a narrow definition that is purposeful to prevent fraud.