Source: The Great Interpretation of Dreams (Ibn Sirin)
Selling in a dream indicates dispensing with the thing sold. Whoever sells his hereafter for his worldly life has lost. Whoever sells his worldly life for his hereafter has profited.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Selling indicates separation. Whoever sells something he loves will part with someone dear to him.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Selling is interpreted as worry. Whoever sees himself selling something will be afflicted with worry.