"'The time has come! The day has arrived! Let not the buyer rejoice nor the seller grieve, for my wrath is on the whole crowd.'" NIV translation
This verse speaks of the poor selling their property and the rich buying it. In this time of judgment, the possessions will not matter anymore and material wealth will not protect anyone.
"'The seller will not recover the property that was sold - as long as both buyer and seller live. For the vision concerning the whole crowd will not be reversed. Because of their sins, not one of them will preserve their life.'" NIV translation
This verse speaks about the timing of the judgment and the fact that it will be before the next year of jubilee.
In Leviticus 25, instructions were given to Israel concerning the buying and selling of land. Every fifty years, the land would be returned to the family that had sold it.
"'They have blown the trumpet, they have made all things ready, but no one will go into battle, for my wrath is on the whole crowd. Outside is the sword; inside are plague and famine. Those in the country will die by the sword; those in the city will be devoured by famine and plague.'" NIV translation
The blowing of the trumper refers to the instructions that Israel was given by God. When Israel was to fight enemies within their land that were oppressing them, the priests were to blow the silver trumpets and God would remember them (see Numbers 10). Here, we see that the blowing of the trumpets will not save them as the judgment is from God and no army or man can stand against it. Once again, we see the completeness of the judgment. Material wealth could not protect the people and now we see that location will not either. Although they would perish by different methods, the result was the same no matter where they were located.
The same thing will be true in the last days as the judgment of God will touch all nations. It seems like there are some countries today that have been rather insulated from the problems of our world. In the last days, there will be such massive changes to the world that it will no longer be possible for a group of people to be insulated from its effects.