“The Bench examined Sergeant Henderson's watch and decided that the defendant was wrong in his estimation of its value.”
“He who reads my heart knows that my estimation of your intellectual and spiritual attainments is greater than that of my own.”
“This is indeed a difficult question to answer because many projects are novel and there is no direct market that can provide an estimation of the price.”
estimate
A general idea about the value, size, or cost of (something).
(construction and business) A document (or verbal notification) specifying how much a job will probably cost.