3,556. Produce and Money in Different Locations

Hilchos Maaser Sheini and Neta Revai 8:9

If the buyer gave the seller two sela of second tithe money but he didn’t bring the produce into his domain until its price dropped to a sela, what he redeemed is effectively redeemed and the two parties must litigate for the difference (the outcome depending on how they wish to proceed). The reason for this (and the preceding halacha) is because redeeming second tithe is tantamount to bringing it into his domain.

Hilchos Maaser Sheini and Neta Revai 8:10

If one has secular produce in Jerusalem and second tithe money outside of Jerusalem, he may transfer the sanctity from that money to that produce and eat it in Jerusalem in ritual purity. The money is rendered secular where it is.