appraiser
n. a professional who makes appraisals of the value of property. Some specialize in real property, and others in other types of assets from rugs to rings. A careful, well-trained and practical appraiser may be more important than any other professional in a transaction, since one who grossly undervalues or overvalues property (or has no knowledge of true value) can wreak havoc. Where possible, a person should ask for a profile of other clients and training, and ask whether the appraiser is "MAI" (Member, Appraisal Institute).