for the target market, a few $ makes no difference... for a bottle of something that they know they like and for organic. the target market here is slightly above middle-of-the-road middle class, and up.
but yes, fifty thousand extra for a house makes a big difference!!
Personally, I have not witnessed this phenomenon in which they introduce the product at $16.99 then raise the price 47%. It appears to be a marketing strategy better suited to heroin or Oxycontin than Italian sparkling wines, but I can't say it isn't happening in some locales.