What is the proper measure of value for a witness testifying on the issue of value of property subject to condemnation?

Appellants also claim error in permitting the witness to be asked what the listing price was for this adjoining property, since the true measure of value, if it was an open market sale, was the actual sale price. The price paid for similar property in the vicinity is admissible on direct examination and cross-examination of a witness who is presenting testimony on the issue of value of property subject to condemnation. [184 Cal.App.2d 440] County of Los Angeles v. Faus, supra, 48 Cal.2d at page 676, 312 P.2d 680.