Two things to think about.

First thing is your pricing. I bought my items from a reputable and recommended store here on line. OEM Filter $15.75, OEM Gasket $8.15, Drain plug gasket $1.53. Plus a small shipping charge. I bought my fluid for less than $10/shipped (1 quart) to my house. Bought 9 to be on the safe side.

Second thing is that if you do it yourself, you know it was done and correctly.

Just my opinion why I plan to do it myself.

James