G.B.
Almost all of them are the same concept. Stick the DVD in place and shut the lid, press play. They all work the same. The only issue we have had with any of them is when we are traveling sometimes the cut out when we hit a bump or something in the road. I think most have fixed that issue.
Cost does not make one better, they all do basically the same thing. If they want one and like Barbie better than Disney Princesses go with who they want more or which one has the better price.
If you google kids dvd players there are lots of sites out there that sell them and there are tons of parent reviews.
We always buy in the electronics department. I prefer the plain old black ones that will last until after the kids are tired of Barbie...lol.