How does one find the value of an old doll? [View all]

Today I found a doll, it's about five and a quarter inches tall, looks like porcelain, has clothes that are sewn on and according to the note my dad left with it, it belonged to my mom's great grandmother in Denmark. I don't want to remove the clothes to look for some kind of trademark and I have no clue how to find out how much this thing is worth or where to go to sell it. Any advice would be greatly appreciated!