Check out the 'replacing of old wire with new' job that the original "electrician" did below. Terrible work ethic. It's important, and if you think it's not, think again.
I heard yesterday of someone who bought a house, and when they had the power turned on, by 2pm the whole house burned to the ground. Electrical is the first thing I think of.
This is the 'new' wiring to a wall jack in the house. Again, it's all getting fixed with the new guys.