Buffon is considering retirement, which seems to be the reason why he turned down a move to Saudi Arabia. I also think he made enough money during his career to live his life comfortably. Moreover, he loves Italy and most likely just wants to stay at home, perhaps continue his career as a goalkeeping coach, I think that his experience will be invaluable for the younger generation of goalkeepers in Italy.
I think it is better for buffon to retire and enjoy his old age as you said, the money and fame he has earned in his 28 year career as a professional footballer. Many titles have been won both with the club and the Italian National Team. With the influx of offers tempting him, he is faced with three choices for now. Postponing retirement, continuing to play one more year with Parma or moving to the Saudi Pro League. This offer must be very tempting because the Saudi Arabian Pro League club on average dares to give the player a large salary.
But it seems that this has not made Buffon change his mind to hang up his boots because he has been hit with injuries so often like last season. However, if it is actually realized and successfully recruited to the Arab Pro League, you can be sure that Buffon will get a large salary and become a new icon there and it looks like he will beat all the highest paid goalkeepers at 45 years old.