I think it would depend on how elaborate her dress is & it would also depend on if you were going to use a Barbie pick or a real Barbie. With a Barbie pick & having a 'not no elaborate' dress, I would probably charge about $35. If I used a real Barbie I would charge for that & I would also charge more if I did a more difficult design.
CAMBO, years ago before I was making cakes my sister ordered a barbie cake for her daughter, instead of the wondermold the girl used one of those pampered chef glass bowls to give the skirt more fullness. It was a cute cake and 4 years ago she paid $35 for it. I would say in the ball park of $35-$40 knowing your area and your ability to make a stunning cake! Good luck, can't wait to see it
your southern sis 
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