They knock a few bucks off ...
They knock a few bucks off her price.
&
They knock off a few bucks her price.

What is the difference?

Question

They knock a few bucks off ...
They knock a few bucks off her price.
&
They knock off a few bucks her price.

What is the difference?

Answer

No difference in meaning:
"They knock a few bucks off her price."
"They knock a few bucks off of her price."
"They knock off a few bucks from her price."

"They knock off a few bucks her price." You need to say "from her price" in order to explain where they are "knocking off a few bucks"

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