The person who placed the ad may actually be the breeder.
The dog is desexed, up to date with everything & obviously well cared for so maybe it was run on & is now available for a pet home. Phone & check if you are concerned but its the not desexed, matted, filthy, neglected looking ones that state pedigree & make good breeder that are the worrying ads.
This looks a beautiful dog for someone. I love this breed.
Generally if the ad is placed by a breeder it states breeder not owner, but yes, I suppose it's possible. Clearly the dog has been well cared for, I just thought the breeder might want to know she's being on-sold.