Are most games worth $50-$60, even today?

[SHMUPGurus]

I've been meaning to ask this question lately after playing countless hours of Persona 4 and Persona 3 FES (amazing by the way). I know, both games are RPGs and are "last gen" so it's a bit unfair to ask this, but how come I've had more hour of playtime on both games and I only paid 30$ for each? Did they even sell at $50-$60 when they released anyways? That's the thing that grinds my gears though, why are some of these games selling for so low and yet at the same time you find Halo Wars for $60 on a shelf and that game isn't even worth playing after completing the campaign on all difficulty levels, IMO (I'm not a multiplayer type of guy, sorry)?

What is the measure stores/companies use to price games? Are we seriously still paying for "the name?" Should the game content change the price or anything? In other words, what do you think would be the perfect price for games depending on which genre?

Personally, I wouldn't mind paying $50-$60 for any RPGs out there. Most of the time, you'll get more than your money's worth. Also, if the developers find interesting ways to keep the game fresh everytime you open it up (instead of inserting random battles here and there), you know they deserve all that money! For FPSs, I would probably not pay more than 20$ because most campaign only last 6-8 missions nowadays because developers seem to focus on the multiplayer part of their games for some reason... For games like that, I guess that's why game rental services exist!