I could say so much about this, from so many angles.
Literally: For so many churches, the membership has dwindled, and they are selling their buildings because they can no longer afford the upkeep. It’s so painful for those who’ve invested so much in that congregation.
Figuratively: The visible institutional church has tried to sell out to the prevailing winds of culture. Efforts and solutions are placed on another campaign, program, slogan, survey, re-location, or personality.
Spiritually: The invisible, global Body/Bride of Messiah cannot be sold or bought. It is the Church Triumphant. Nothing can prevail against it. Invite them in.