unvendable
/ʌnˈvɛndəbəl/Definitions
1. adjective
Impossible or difficult to sell, especially because of being of poor quality.
“Due to the low quality of the merchandise, the store’s inventory has become unvendable.”
2. noun
Something that is impossible or difficult to sell.
“The unvendable products were cleared out in a massive sale to make room for new stock.”