Id. In condemnation proceedings, evidence of owners’ offers to sell their own property may be permitted as admissions of value. Albert Hanson Lumber Co. v. United States , 261 U.S. 581, 589 (1923) (“the specified price was fixed with perfect freedom; they show a completed agreement of purchase and sale; and there is no reason why they should not be considered as the owner’s admission of the then value of the property”); cf. United States v. Hart , 312 F.2d 127, 130 (6th Cir. 1963) (“The testimony was that of the offerors themselves under oath, and not that of the offerees. [It] was not tendered primarily for valuation purposes, negativing any apparent motive for fabrication.” citing Erceg