Honestly, for a kid that isn't really into dolls there's no way I'd buy one, let alone do the whole big trip to boot. I can totally see myself regretting the money spent every time I spied the doll lonely and ignored on the shelf. The trip might be a special time, but IMO for a six year old a special day trip to places in your own town that she would enjoy, maybe a grown up teatime in a nice restaurant in a fancy dress, after shopping for said dress and lovely (inexpensive) jewelry, and a special toy of her choice in a regular toy store, whatever kind of thing would appeal to her...would be just as special and memorable for pennies on the dollar. You can make a huge day out for a little girl without spending enough to take the whole family on vacation. JMHO
Don't get me wrong. I was a doll girl, and I still have some of my faves who were very well loved and cared for (most cherished is my original Sasha) as well as played with, as someone else said, for longer than I would admit to in public. I would have LOVED one of those, and played with it often and for ages. But my own daughter "loves" dolls for about half an hour, and only wants them generally based on whatever the other girls at school "love", and after that they are completely ignored. If I'd ever bought her an expensive one, I'd be kicking myself around the block.