Hundreds of unhired cars from a massive fleet owned by Uber have started appearing on the used-car market, just a week after the American ride-hailing app was switched off here.

Mainly Mazda 3 sedans and Honda Vezel crossovers bought by Uber-owned Lion City Rentals last year, the cars - with 50km clocked or less - are being sold at a loss of between $10,000 and $20,000 each.