We sold my grandparents house in the bay area for $1.6 million about 6 years ago, it sold again for $2 million last year, and Zillow currently estimates it to b

We sold my grandparents house in the bay area for $1.6 million about 6 years ago, it sold again for $2 million last year, and Zillow currently estimates it to be worth about $2.3 million. My grandparents bought the place in the 60's for under $50,000, if I recall correctly.