This would be my first Mopar product and i would like to invest into a domestic.
If you go into this thinking of it as an "investment", please consider buying gold instead.
In terms of reliability and frequency of repair, if you're coming from something like a Toyota or a Honda, chances are you'll be less than thrilled. These cars are the offspring of a marriage between Chrysler and Fiat, so just think about that for a minute.
If you're coming from, say, a BMW, you'll probably be happier with the lower part and repair costs.
In terms of the mileage, yes, that's considerably higher than average,
and it should be reflected in the sale price. If you're asking how the mileage will affect the car's reliability and remaining service life, chances are, not much. With modern engineering and lubricants, the difference in engine wear between a 5 mile trip and a 500 mile trip can't even be measured, so your 80,000 mile Charger might be in better mechanical shape than one with 30,000 miles that was driven mainly on short trips.
When you see the car in person, check the total engine hours on the EVIC, and divide the odometer mileage by that number. If you come up with around 40 MPH, for example, that car spent most of it's life rolling down the highway, and you're looking at relatively easy miles. 20 MPH, it was probably used in police, taxi, or delivery service, or something similar, in which case, those are harder miles.
Check the car's service history
here and
here, and remember to ignore anything the dealer tells you.