Around $250-$350. The PS2 was introduced that year in North America for $300. So you could get one for about the price of a standalone DVD player. Why wouldn’t you? Nobody cares now, of course, but it was a big thing at the time.
Oh, and the PS2 played all the existing PS1 games. To this day, I still tell people that the PS2 is one of the best deals in retro gaming because of the wide range of titles it can play. Lots of hidden gems to find. Even better if you can score an early model PS3, but they’re harder to find and more expensive than a PS2.