I started collecting Barney CDs when my daughter was nearly 1 year old. My sister first gave her 3 Barney CDs on alphabets, numbers and one with the collection of Barney songs. I watched them with my daughter and I liked them. We used to watch Barney regularly on television with my nephew and my daughter. I bought few copies of the CD (around $2-$3 each; original copies of course but very cheap in my country) but most of those in my collection were given by my sister.
One good thing I really liked about Barney is that the show is very interactive, they have beautiful songs and stories for kids, and lots of things to learn. I have 12 Barney CDs to date and my sister will send us more soon as she learned that my son, who is 2 years old, is now also very fond of Barney.
My daughter is now 4 years old and still loves watching Barney at least 3 to 4 times in a week. Barney CD collection is a good way of educating kids from alphabets, to numbers, to values and good manners. I believe that it also encourages kids to get involve in music as well as sports and creative play and arts.