How old would you guess a Whirlpool Thin Twin to be, that is almond in color and has the glass dryer door window. Early to mid 80s? Would this machine still be worth having over a newer GE/Kenmore/Fridigaire clone stackables? Or would it be better to stack an older, used F/L Fridigaire. My son is moving into an apartment, and the stackables are all that will fit, so we are looking around, trying to figure out what would be the best units to purchase used, as he can't afford the $1,000+ price of a new set.