When a person dedicates an animal that is physically unfit to be offered on the altar, its sacred status must be converted into a monetary value for the Temple treasury. To achieve this, the animal must physically stand before the priest, who determines its exact market price for secular sale [רלב״ג, ביאור שטיינזלץ, ביאור יש״ר]. This requirement of physical presentation and formal valuation applies to any item dedicated for the maintenance of the Temple [אדרת אליהו].
The priest is instructed to assess the animal carefully, a process understood in two distinct ways. One perspective suggests this requires a meticulous physical examination to determine whether the animal is healthy, fat, and fit for work, or lean and weak [מלבי״ם, ביאור יש״ר]. The appraisal must be exact rather than a rough estimate to protect the Temple from financial loss [תורה תמימה]. At the same time, the priest is bound by strict honesty. He cannot artificially inflate the price just to enrich the treasury; if he intentionally overvalues the animal, the redemption is entirely invalid [העמק דבר]. An alternative perspective focuses on the outcome of the assessment rather than the physical inspection. Whether the priest's valuation ultimately proves profitable or detrimental to the Temple, his decision is final and binding [רלב״ג, הכתב והקבלה, פירושי רד צ הופמן].
The absolute nature of the priest's ruling means that even if expert cattle merchants dispute his appraisal, his word remains unchanged, acting as a divine decree [ביאור יש״ר, ביאור שטיינזלץ]. This finality holds true even if the priest makes an honest mistake in his calculation [העמק דבר]. The binding nature of this valuation also extends to the auction process. If multiple buyers offer increasing bids but subsequently back out, the highest offered value remains legally enforceable. The Temple collects the difference from the assets of those who reneged, ensuring the promised funds are fully secured [תורה תמימה, מלבי״ם, אדרת אליהו].
The primary approach among commentators is that the priest's set price applies to any outside buyer interested in the dedicated item. However, if the original owner or his heirs wish to buy back the animal, they must pay the base value plus an additional one-fifth [רש״י, מזרחי, פירושי רד צ הופמן]. This surcharge is understood through two different lenses. Psychologically, people are naturally attached to their original possessions and prefer them over new ones, making the animal inherently more valuable to its original owner [שפתי חכמים, גור אריה]. Conceptually, returning dedicated property to its original owner requires an elevation in holiness, which the base price alone cannot achieve. Because a four-sided shape represents a complete whole, the addition of a fifth part symbolizes the first true elevation beyond the standard completion [גור אריה, שפתי חכמים].
A distinctly different approach argues that the law does not involve selling dedicated items to outsiders at all. Instead, the owner never hands the animal over to a Temple treasurer. He keeps it in his possession and treats it with sanctity. However, because God does not desire a religious act that lacks practical benefit to others, the owner must immediately pay the animal's base value to the House of God and the priests upon dedication. The animal remains with him in a holy state. Only if he later decides to completely remove its sacred status for everyday use must he pay the additional one-fifth to fully redeem it [שד״ל].