The price I am willing to pay depends a lot on what games the system has. If I had to pay $500 for a system to play Breath of the Wild, then I probably would have done it. But then again I had been waiting 25 years for a game like that. It's very rare for a game like that to come along.
Then I look at where Playstation is heading. I have been really, really disappointed with the PS4's game library. The franchises I like are either getting worse, or just getting discontinued. And new franchises I like are not replacing them. I used to buy Playstation just to get the latest Final Fantasy game. Now I don't even care about Final Fantasy anymore. Kingdom Hearts 3? Well, I feel like I'd have to spend several hours just to understand the story between KH2 and KH3. That is work and not fun. No thanks. Western games in general kind of suck to me (mostly); I've always prefered Japanese games. So Playstation is looking less and less attractive. At $400 I probably wouldn't get one at launch. At $500 I just plan on waiting for several years, and even then it is mostly a device for movies and streaming once I actually get one.
I only have enjoyed 4 games on the PS4 (Uncharted 4, Dark Souls 3, Spider-Man, Undertale). They need to get some radically new and better type of games to get me excited for PS5. Right now I am playing my PS2 a lot. There are tons of games on the PS2 that I overlooked originally, but are actually pretty fun. And I can often get them for $10 or so (give or take). I can play a fun racing game like Need for Speed or Burnout. I am sure I can play games like this on the PS4 or PS5, but why would I? It's just a graphical improvement. Where is the new experience? I am looking for games that give me a new experience. PS4 was really lacking in that. Uncharted 4 actually is a much better game that Uncharted 1 even if the graphics were the same. But most other franchises are not that way. If I play Need for Speed on PS4 or PS5 it might not feel any better than the equivalent game on the PS2.
For me the biggest problem with PS5 is that it needs new experiences, new types of games. Now, if you want to talk about a business perspective, then I think a $500+ price tag is just dumb. But for me personally, I would pay that if the games were good enough. On PS4 the games are nowhere close to that. AAA third party games are seriously slacking nowadays. I'm not going to pay much for a device that focuses on AAA third party. For me, I need Sony to bring some new and fun games to PS5. Microsoft just bought a bunch of new studios, and Nintendo is currently killing it with the games they are bringing to Switch. Sony needs to step up their game. Don't get me wrong. They have some good games, but they need more. Third party is not cutting it right now, not for me anyways. I need Sony to bring in some better games.