Is a 2004 ford explorer with 58 k a good purchase l. Does it have electrical problems and would it be a good purchase for 6k

What is your question?

I've not yet bought the car. I took it to a mechanic for a check up. All was ok, except suddenly the car passenger side window rolls up, but not down. This happened after the check up which made me worry about electrical problems. There are no other known problems, however, I am now reading about horrific electrical problems when the car just may stop for no reason. I am concerned the car may be a safety issue if there are so many reports of electrical issues. Any help would be appreciated.