Financial Responsibility: Infant, Baby Einstein

Baby Einstein Dvd's

I am looking to buy Baby Einstein DVD’s and/or CD’s /if you are done with yours..and you think they are good/. Also have a question on what experience do you have with any DVD’s/CD’s for babies, How old the baby has to be to watch them /and for how long/ or shows interest in it. Any kind of advice will be greatly appreciated. Thank you!