Asalamualikum, someone in my family has vases with 3D (statue like) dragons on them and also has a chair with a lion head sculpture and lastly, they have pictures of what seem to be fancy christian crosses. Can we sell or keep these things? Or should they be thrown in garbage? (they expensive sadly)

Ustadh AbdulAziz al-Haqqan

This is forbidden. What you can do is maybe cut off the heads, or you can sell the material itself. You turn them into material and sell them, but it's not allowed for you to sell crosses, statues, and so on.