This is a great example of the kind of repairs homeowners make on their own home. This is definitely not a repair job done by a professional plumber.
Thank goodness for home inspectors who are willing to stick their heads under sinks and take a look at this stuff for the home buyer.
To me, that one just puts a smile on my face to imagine the "hey honey, I fixed the sink!"
Thanks to Mr. Home Inspector, Home Inspection Geneva, for this video.