A large co-op with a $4 million budget should certainly feel that 5 percent uncollected maintenance ($200,000) is unacceptable, and adopt more aggressive collection procedures.

Lenders, he said, tend to scrutinize the financial profile of individual shareholders far more closely than in larger co-ops.

When Peter Alkalay's father died, he supervised his mother's move to a large co-op in Scarsdale.

"A number of large co-ops in Bergen County are courting the possibility of conversion," he said.

He explained that in many large co-op and condominium buildings, the charge for electric power is based on readings from the building's master meter.

A large two-bedroom co-op at 435 Convent Avenue is being offered at $150,000.

Klerksdorp has the largest agricultural co-op in the southern hemisphere, named 'Senwes'.

Class 2 properties - which include rental buildings and large co-ops and condominiums - accounted for about 22,700 appeals.

Mr. Goldstein gives as an illustration a larger co-op that may have had interest income of $100,000 in 1989.

He is one of the largest co-op and condominium converters in the United States.