Thank you for submitting your item for appraisal. This appears to be a late 19th century walnut commode and washstand with marble top and backsplash. These washstands are quite common, they basically were the bathroom of the 19th century with a pitcher and wash basin on top and are often the lone survivors of a set of bedroom furniture. The estimate is based on similar items offered or sold at auction. There is no measurement for the sentimental value you migt attach to it.