I can't tell you how old they are because they came with the house we bought a little over a year ago.
I can tell you that they are in excellent shape, very clean and run perfectly.
The Washer is a PAV-1 Oversize Capacity Plus Washer (top loading).
The Dryer is a PYE/G2300, 3300 Auto Dry Dryer
Both with original User's Guide
Asking $250 OBO
Pick up preferred.