Helmut Diller Anri Music Box Wooden Pintail

I purchased several Helmut Diller Anri music boxes of birds, such as Teals, Mallards, Pintail, Swans, in the 1980's and was wondering if these are of any value? I've seen these sold on auction sites but wasn't sure if the prices they were asking on these sites bear any merit. They play a different song for each type of bird, such as "Gypsy Baron Waltz" for the Pintail and "Swan Song" for the swan. They measure around 4 or 5 inches in diameter. I still have the boxes which were just plain brown corrugated boxes some marked with an Anri sticker and others just with a description of they type of music box.