613 Mitzvot
Negative Mitzvot 25
Not to benefit from idols or their ornaments 

Velo-tavi to'evah el-beytecha vehayita cherem kamohu shakets teshaketsenu veta'ev teta'avenu ki-cherem hu.
You shall not bring an abomination into your house, and become a cursed thing like it: you shall utterly detest it, and you shall utterly abhor it; for it is a cursed thing.

We are not allowed to derive benefit from any type of idol- worship. We must stay far removed from its practice, its places of worship and everything connected to it.

Cherem is the Hebrew word for cursed thing. It means something that is dedicated for complete destruction. Such things we are to detest and abhor it. Once we destroy an idol, we are not to use its material for personal gain.   Rambam even forbids the use of wood idols for firewood in our homes. It is to be completely destroyed. Therefore, when we get rid of idols in our homes, we are forbidden from selling them, but rather we should completely destroy them.

Devarim (Deuteronomy) 13:18(17) There shall cleave nothing of the cursed thing to your hand; that YHVH may turn from the fierceness of his anger, and show you mercy, and have compassion on you, and multiply you, as he has sworn to your fathers;

This verse helps us to understand what our mitzvah means by our homes becoming a cursed thing.  If we do cling to a cursed object, we face the anger of YHVH. There will be no increase. However, once we destroy them completely, He will show forgiveness again.

Yehoshua (Joshua 6:18)  But as for you, only keep yourselves from the accursed thing, lest you make yourself accursed, you take of the devoted thing; so would you make the camp of Yisra?el accursed, and trouble it.

This was the error or Akhan in Yehoshua (Joshua) perek (chapter) seven. When I saw among the spoil a goodly mantle of Shin?ar, and two hundred shekels of silver, and a wedge of gold of fifty shekels weight, then I coveted them, and took them; and, behold, they are hid in the earth in the midst of my tent, and the silver under it. (Yehoshua/Joshua 7:21).