Rambam - Sefer HaMitzvos: Positive Mitzvot 115, 116, 117: Positive Mitzvot 115, 116, 117

Positive Mitzvah 115: Donating the Value of Animals
Leviticus 27:11-12 "Then he shall present the animal before the priest and the priest shall value it"

A person may want to make a donation to the service of HaShem equal to the value of a non-kosher animal or an animal that may not be sacrificed.

He is to consult the priest to evaluate the animal according to specific Torah guidelines.

The amount that the priest determines the animal to be worth will be the amount that the donor must contribute.

Positive Mitzvah 116: Donating the Value of Houses
Leviticus 27:14 "And if a man shall sanctify his house...the priest shall estimate it"

A person may want to make a donation to the service of HaShem, equal to the value of his house. The priest determines the amount according to guidelines set in the Torah and the donor is commanded to contribute that amount.

Positive Mitzvah 117: Donating the Value of Fields
Leviticus 27:16-22 "And if a man shall dedicate some part of a field"

A person who wants to make a contribution to the service of HaShem equal to the value of his field, consults the priest.

The field is evaluated according to the guidelines set in the Torah and the donor is commanded to contribute that amount.

There are many kinds of barriers: Those from within and those from without. Barriers between people. Barriers that prevent you from doing good things. Barriers of your own mind and your own hesitations. There are the barriers that exist simply because you are a limited being. Joy breaks through all barriers.

From: Bringing Heaven Down to Earth by Tzvi Freeman - tzvif@aol.com