Another company said it would take wheat and garlic – valued at two to five yuan per kilo.
China's property market has long been a closely tracked bellwether for the country's economy. The sector, however, has struggled recently, given weak buyer demand leading home prices in China to fall in May for the second month in row.
Developers are also saddled with debt, with one major company – Shimao – defaulting last week on a $1 billion offshore bond, citing "challenging operating and funding conditions", according to a stock market filing.
Other major Chinese property firms, including Evergrande and Sunac, have also defaulted on debt obligations.
Experts say more stimulus is needed on top of measures that more than 100 cities in China have already taken to boost demand by slashing mortgage rates, allowing smaller down payments and handing out subsidies.
China's tight zero-Covid policies – in which residents are sealed into their homes, unable to leave to buy groceries or walk their dogs, with those testing positive or deemed close contacts sent to government quarantine – has also meant developers, agents and buyers have been unable to visit properties and set up deals.
For reasons unknown, at least the firm in Nanjing seeking watermelon as payment has had to halt its unique promotion upon request from headquarters, according to Chinese state media.