I expect this is largely due to the prevalence of decent-enough quality digital pianos. A school or church no longer needs to deal with a second-hand honky-tonk that needs maintenance and tuning (not to mention several people to move) - they can get a passable digital for a few hundred bucks.
The only market for real pianos these days is with serious professionals, concert venues, and people who use them as furniture.
The only market for real pianos these days is with serious professionals, concert venues, and people who use them as furniture.