Final answer:
When purchasing an electric file, it's important to consider power, vibration, and price.
Step-by-step explanation:
When purchasing an electric file, it's important to consider power, vibration, and price. The power of the electric file will determine how quickly and effectively it can file or shape the nails.
Vibration levels are important since excessive vibration can cause discomfort or fatigue during use.
Lastly, the price should be considered to ensure that the electric file fits within the budget of the buyer.