5 Responses to âChange is Constant: 100 Years of New York Real Estateâ. [â¦] 1  Read more: Change is Constant: 100 Years of New York Real Estate | Miller Samuel Appraisers Consultants. [â¦] 2  Those historical PPSF numbers got me thinking about whether prices have kept up with inflation. Boy, have they! 3  What a well thought out timeline.