פירוש על קידושין 109:6

This difficulty is raised against R. Oshaya who said that according to R. Meir if one finds an animal near Jerusalem he can redeem it and use the money to buy a peace-offering. A peace-offering is a sacrifice of lower sanctity. But we only know that R. Meir said this about something that is of the highest sanctity. Do we know that he said this about sacrifices of lower sanctity.

The argument here is pretty straightforward. If R. Meir holds that items of higher sanctity can be desacralized, all the more so items of lower sanctity.