Washer wasn't agitating

We couldn't get a repair to come out - were told to buy a new because it would cost too much to fix. I did not agree. I pulled the agitator off and discovered it was not working and the agitator coupler was spinning. I ordered both and put them in myself. My washer now worked like new! All for less than $100. The service guy wouldn't eve come out for less than $175 and that did not include parts!