Here in the heart of the Bible belt there are a lot of church sales.
I've appraised 6-7 over the years, smallish size (10,000 s.f. or less) and usually older, 20-40+ years. There's a lot of comps so a SCA is reasonable and credible.
Its surprising how fast some of them sell when listed. There's always a splinter group breaking away from a large church wanting to start their own.
Alternate uses for some have been: Day Care facility, Wedding chapel, and one was converted into a Town Hall. These were the old ones that suffered from a lot of various obsolescence. The older ones sold for about $15-$20/s.f., the newer ones about $60/s.f. with some in between.