Are the parents available for you to look at? Have you seen them or not? They may be a good indication of what the health and looks the kitten will have when (s)he grows up.
I had a Persian growing up. He was the most sweet and beautiful personality. However his fur was a nightmare and took DAILY brushing or else he would matt right down to the skin. He was supposedly a purebred with papers but he had the calcivirus and had mouth ulcers in his mouth his whole life which we had to get steroid shots to make them go away temporarily.
This is why I ask about the parents. If the parents are a terror to brush, then it may happen that your kitten will require a lot of grooming and this is something you may want to consider if you have the money/time, etc.,. to put towards a higher maintenance kitty. And if the parents have health issues, this is something you may need to know as well, so as to know whether or not the cat may harbor illnesses during its life and whether you are prepared financially or emotionally for these extra aspects to your cat's and your life.
I think the baby is breathtakingly beautiful and seems active and sweet. I personally would never have a persian again - unless I was quite rich - because of the neccessary maintenance due to the fur. I am not trying to dissuade you. Some people love to brush their persians every day and start out with a very good grooming relationship - I did not have that luxury, our cat was a "gift" at the age of him being 6 months old from a family that decided with moving they only wanted to have TWO cats not three - and some persian owners say they are not as much of a maintanence as my Kami Kazi was - which may mean he was not purebred or if so not WELL bred.
I also loved Kami Kazi so exquisitely deeply. We were extremely bonded. Out of a family of 6 humans, he decided I was to be his caretaker. At the tender age of 12, and with his daunting physical requirements, it was an honor and a privilege but also a lot of work. I started working at the age of 15 - before that I babysat - and all the money that I did NOT spend on his welfare I could then spend on myself - like glasses, clothes, etc.,. for me. He taught me responsibility, and he was exceedingly grateful for everything I gave him.
Kazi was a blessing and taught me grace and trust. When he was too scared to eat from his bowl on his own - because the ulcers were bad at times and it took a while for the drugs to work - I would hold the bowl for him, and he would reluctantly keep coming back to the bowl for food. He trusted me, and that trust touched my very soul. Despite his illnesses he had 10 years which I think for the most part were filled with joy despite the illness; after that the drugs stopped working which the vets had warned us his whole life might happen and then I gave him the quiet death. I know Kazi loved me I know as much as I loved him. Even saying I wouldn't have another persian in my current situation I will tell you this. I would do it over and over again with Kazi. I loved him completely. I just wish I knew now and could do it over again and do it better, take care of him better and love him even better than I did.
Persians are a joy for theirs is usually a quiet and deep love. They are gentle sweet creatures - again for the most part - and I totally understand why people go out of their way to include them in their lives.
Just some thoughts from my experience.
And if you do decide to bring one home, remember to start grooming them right away and make it pleasant, for then they will be easier to care for for the remainder of their days with you. Start early, and start often!

Best wishes,
Liz
PS $250 in America, is a fair price for a Persian. Most Persians I have seen they ask a bit more for. Like $300-$500 dollars is more average but $250 is not exceedingly low. The face and eyes do not seem to be show quality Persian. If he is breeding these JUST for pets, then the quality does not have to be perfect. The eyes for example should probably be rounder like buttons.

Here is a
show quality picture of Persian kittens for comparison.
The quality on the picture you showed does not look like a poor quality Persian, but it doesn't look like a show quality persian, and therefore may not be a purebred Persian. Just in my opinion from the pictures I saw.