Can an expert testify that the disclosure of damage to a vehicle causes the vehicle's value to decline?

In Reinders v. Wilkinson [1993] B.C.J. No. 3141 (at para 14) the trial judge rejected the expert testimony because “… [he] gave no facts upon which his opinion could be assessed other than his observation that the disclosure of damage depressed selling prices of vehicles. He did not explain if the amount of the discount increased or decreased as time passed following the accident and repair. He offered no statistics to buttress his estimate of the decrease in value, nor did he indicate that there was any solid empirical basis for his opinion. It was simply a "bare" opinion and, as such, difficult to assess in terms of its reliability.”