Hello Carlos,
my personal opinion is that you have always check a used engine before you put it into your car. So if you want a good engine you have to check and replace some things before you put it in the car. And that will always cost some money. And all this LN blah blah… but OK, i have my own opinion when it comes to these things.
But OK, what i don't like if someone has cut wiring and hoses. That means the person who removed the engine was in a hurry to do it. And from my personal experiences that is not a good sign.
Regards, Markus