Not at any price; not for anything.
Ни за какие деньги, ни за что на свете, и т.д.
Not for worlds would he let his children go hungry.
I wouldn't hurt his feelings for the world.
I will not marry him not for love nor money.
Я не выйду за него ни за какие деньги.
No I won't do it - not for all the tea in China.
Нет, я не буду делать этого, – ни за какие коврижки.