Menachot 82: Proofs that Sacrificial Obligations Cannot be Aquired with Sanctified Money

A new Mishna focuses on the the fact that the Pesach sacrifice must be brought from tzon u'bakar, the flock and the herd.  This refers to cattle, even though only specific types of cattle, including lambs or goats.  The Mishna argues that cattle is used as a general term to connect other sacrifices to the Pesach offering.  In this way, we know that we buy the Pesach offering with personal and not sanctified funds.  Of note - the the Pesach offering was first brought, the laws regarding sanctified funds had not been created.  Thus we can conclude that all other required sacrifices must come from personal and not sanctified money.

The acharonim search in the Torah for a source teaching us that required sacrifices cannot be bought with sanctified money.  They note that if one obligates him/herself to bring an offering and s/he is already obligated to bring an offering (sin/guilt), we would assume that the obligation cannot be fulfilled using sanctified money.

Steinsaltz teaches us that Rav Shlomo Zalman Lifshitz agrees with Rambam: once an animal has been bought to be a sacrifice using second tithe money, the holiness of the money disappears and is replaced with the new sanctity of the sacrifice.  Perhaps other sacrifices could remove that sanctity as well?  The Pesach offering would teach that this is not the case.