I have the all-weather mats so the stock ones are brand new, never used. Set of 4. I think they'd fit a same-year Outback too since it's basically the same body but cannot confirm that. $20?
Keep one in the car for a mat to stand on while changing after a ride. The rubber bottom and carpet top are much nicer than muddy gravel. I don't have a subaru. Free extra bump anyway.