I have resisted the urge to purchase these figures only because I know once I start I will need to have them all. The Monster High characters are so well designed and look great on display. These will only increase in value over time because it's one of the rare figure lines that has appeal to both guys and girls. It's hard to be a completist because there are so many different sets to buy. Someone will always be looking for that missing piece to add to their collection. They even sell the blank heads and bodies so you can customize and create original dolls. Females are a undersold part of the action figure market that are only really served by the Japanese (manga and anime genres) where female characters are dominate.