I know there is probably a very limited audience here for this deal but nevertheless, http://www.nbcuniversalstore.com has 12 Barbie DVDs for $5.98 each +tax (a couple of these are actually $3.59 once you put them in the shopping cart). Shipping for one or all 12 is $5.
List of the 12 titles in question is here: http://nbcuniversalstore.resultspage.com/search?p=Q&lbc=nbcuniversalstore&uid=533465660&ts=custom&w=barbie&af=pb:01&isort=score&method=and
List of the 12 titles in question is here: http://nbcuniversalstore.resultspage.com/search?p=Q&lbc=nbcuniversalstore&uid=533465660&ts=custom&w=barbie&af=pb:01&isort=score&method=and