Madame Alexander Dolls

Martha Ann, before any of your club members think I speak with a lisp, whistle show tunes, like Liberace and prance around at gay pride parades, let me settle on the basis for my question: my daughter told me that Madame Alexander dolls are very valuable collectibles — and that some are worth thousands. First, is this true? And, second, do you or any of your members think there is an investment value in acquiring one or more. You know, like valuable old coins, paintings, etc.