We attempted to go that route when we were looking for a pre-owned 2018 Outback. We looked at two Outback 3.6's that were just released from the Subaru loaner program. Thought it would be a great deal, BUT after we looked at the two vehicles at two different dealerships, we decided it was not the best choice for us. For others it may work out great.
The program vehicles were:
The price was higher than other pre-owned Outbacks
3 out of the 4 rims had scratches/scrapes on them
Dog hair was prevalent throughout the interior of the vehicle, a Subaru thing
2 fenders were scraped and/or dented
We opted to purchase a nice pre-owned Outback that was in pristine condition!! Since it was eligible for a Subaru Gold platinum warranty, we purchased the warranty from Luke, who has been mentioned previously on this forum.