Is it worth buying a used Chevy Volt with over 100K miles on it?

The price is right, but is it worth it?
I know I would have to install a power charging station which is an additional 1000 dollars.
There's one for sale at 14,500 dollars… But most used Volts are around 23,000 dollars.

My other two considerations are a new 2015 Honda Fit or a used Mark 6 VW Golf TDI

I've seen people on youtube who average 120 mpg with the volt! One guy's was even 1000 mpg, I don't think he even brought it to the gas station since he bought the car!

You don't actually have to install the charging station if you can tolerate charge times two or three times as long from a 120V line and you don't live in places where it gets incredibly hot or cold.

It's not worth buying an American Car at all.