What kind is worth a lot

Although I am no expert, I happen to know a little bit.
Something you can watch out for is if they have bigger breasts as the older ones had them but then changed them because they found they could not stand up without falling forward. Some older classics that were very popular and collectible for excample was the princess of the Danish court from dolls of the world-the princess collection, collectors edition. Or the Disney 101 dalmatians special edition. Although I wouldn't call them antique there from 1997. They can sell for a pretty penny based on there condition.

That's just a few though but I don't want to go on about it.

A lot of people know much more then me so they will probably get you A lot more info. But I figured I'd share what I knew with you.

Hope I helped a little!

It would be easier if you told us what you have.
You can look on eBay to see what is being sold at the moment.