For more information and to purchase online:

The Complete First Season:
https://www.amazon.com/exec/obidos/ASIN/B0007V6IWQ/ref=nosim/happydaysonline3-20

The Complete Second Season:
https://www.amazon.com/exec/obidos/ASIN/B000B6CODY/ref=nosim/happydaysonline3-20

The Complete Third Season:
https://www.amazon.com/exec/obidos/ASIN/B001DHE9FQ/ref=nosim/happydaysonline3-20

The Complete Fourth Season:
https://www.amazon.com/exec/obidos/ASIN/B001LRTT3A/ref=nosim/happydaysonline3-20

The Complete Series (Sony):
https://www.amazon.com/exec/obidos/ASIN/B00DXLO0BI/ref=nosim/happydaysonline3-20

The Complete Series (Mill Creek):
https://www.amazon.com/exec/obidos/ASIN/B0108N9GEE/ref=nosim/happydaysonline3-20

C'mon get happy!

The Partridge Family - The Complete First Season DVD Review:
http://www.sitcomsonline.com/thepartridgefamilyseason1dvdreview.html

Because I am frugal and a moderate fan of the show since childhood, I prefer to get the DVD sets from a library. Lucky for me, all sets were in mint condition. Some of the episodes I had not seen in years.