Used Wrangler 20 Scrubber Batteries (Old Redford, Detroit)

Looking for 2 used Wrangler 20 Scrubber 12-volt batteries, which will still hold enough power to run the machine for 2 to 3 hours. We only use the machine once a month to clean the social hall floor at our church, Christ the King Catholic Church in far northwest Detroit. It makes no sense to pay $500 for 2 new ones which run for more than 8 hours/daily, when some old used ones will get us by. Please call Ben Washburn at (313) 838-5049 if you can help. We can give you a tax deduction receipt.