E.g. Carlstrom v. United States , 275 F.2d 802, 809 (9th Cir. 1960) (sale six or seven years prior to valuation date); Dickinson v. United States, 154 F.2d 642,43 (4th Cir. 1946) (six years); United States v. Becktold Co. , 129 F.2d 473, 479 (8th Cir. 1942) (passage of 14 years “went to the weight of the evidence, rather than to its admissibility.”).