Should I replace Condenser Coil or entire AC Unit for my central home AC?

I have a refrigerant leak. I was told it was my coil, and it would be $1,863 to replace it. For the part and labor. Would it be cheaper to replace the whole thing? I live in Mississippi and in about a 1.8k sqft home
Update: The unit is about 10 years old. It takes R410 refrigerant. I think it is 2.5 tons?
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