There are 5,200 flats in various Amrapali projects which are either bogus or unsold, court-appointed forensic auditors on Monday told the Supreme Court. Moreover, Amrapali's two properties couldn't be auctioned by Debts Recovery Tribunal as banks refused to finance buyers. The case pertains to petitions filed by homebuyers, seeking possession of around 42,000 flats booked under Amrapali projects.