Availability of auto is better then trying to run around and find the part you need at different parts stores.
The are not limited by location so you can pick from any of them.
You also have many more options when shopping online.
Not only can you find the part you need but you'll have many different ones to choose from.
This is because of their popularity and the ability to get top dollar form parts and wrecked vehicles.
One million volts will probably stop a 165 pound man with one pull of the trigger for 1 second.