What is not a potential risk of purchasing a used car? O used cars can require repairs sooner
O warranties can be very limited
O used cars can have lower initial cost
unexpected issues may arise

The fact that "used cars can have lower initial cost" is not a potential risk.

Potential risk in this context refers to various risk or issues that the used car can develop in the course of active use of the purchased car.

Some others potential risk to this context includes:

In conclusion, as this context i concern, the car having a lower initial cost is not a potential risk because the value ofa  used car is expected to drop.

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used cars can have lower initial cost

Explanation:

Remember, the term risk often refers to an unpleasant or unwelcome event such as a loss arising from a particular action.

Hence, since we are looking for what is not a loss (potential risk) of purchasing a used car, the best option that matches this is that used cars have a lower initial cost which ofcourse can be seen as an advantage.