Hell, I didn't pay $499 for *my* pair when I bought them less than a year old from Sears Outlet Store in 1991! Washer came 18 months before the dryer. After one looong night of needing to schlep one weeks' loads of wet laundry plus the yuge pile from my roommate returning from vacation from the washer to the coin-op laundromat up the street IN THE RAIN, I tripped over myself running out to get the dryer days later. The indoor dryer vent kit I bought to go with worked a treat, and allowed us to keep the dryer in one corner of the living/dining room neatly disguised with a tablecloth when not in use.
Their portability meant that they easily made the rounds among several of my loved ones: my brother used them in his college-housing apartment, my best friend had them briefly until he was married, and they finally ended up with a disabled girlfriend for use in her government housing unit. I predict that they are still running full-tilt for whomever has them now.