9-4-2019· Determining a Good Price on a Used Washer or Dryer. If the original purchase price was $500 and the dryer is 7 years old: $500/10 (average lifespan of washers and dryers in years) = $50 $50 x 3 (years remaining until the 10-year average lifespan) The current value of this dryer is $150. Determining a Good Price on a Used Refrigerator