Beautiful furniture let me say.... would suggest that you get a few antique furniture dealers in first to make offers on the furniture, making it clear that you are 'shopping around for the best price'... then approach a reputable auction house to see if they can do any better... bearing in mind that they take a percentage off the selling price...(in the UK around 15% and 10% off buyers on hammer price so roughly 25% here).
You can then consider whether to sell to the best offer.
Best wishes, Mike.