To be fair, I don't really want Prime of the Wild.  I don't need a map that expansive at least.  But I would like some room to shinespark and some areas to cover with screw attack.  But by it's nature a Metroid game needs to feel more cramped and have more convoluted paths.  I just want the expansiveness of a new gen game when it calls for it.  The arsenal at Samus's disposal would make those areas so much fun to traverse.  Samus doesn't need a speeder bike, she has her feet! Zoom Zoom!

I really doubt Nintendo would put the same amount of money into MP4 as they did in Botw. They know it won't sell nearly as much.

Imagine a metroid vania game though in BOTW's world.... in Breath of the Wild you had the first 4 shrines and then you get the paraglider to open the entire rest of the game, but what if you had that first area just to unlock the morph ball to be able to roll out of the pipes and escape the first area, only to get to the great plateau region and find the outer limits of that region were all blocked by something which required the ability to magnetic roll up walls for example... metroidvania in 3d would be pretty awesome.

Yeah, I see where you're going. I don't necessarily want a Metroid game EXACTLY like BotW either, as Metroid is meant to be much more confined. It wouldn't exactly make sense to have a Metroid game take place 95% outdoors, and having every door unlocked from the beginning. I was moreso agreeing with your statement of having a Metroid game as expansive and ambitious as BotW. I'm imagining something more along the lines of a bigger Tallon IV.

Part of this equation assumes that the game is really, really good.  I could say I want an open world Zelda game.  But if it was as well made as Breath of the Wild, then I'd pay at least $360, because that is what I paid at launch to get a Switch + BotW.  On the other hand if the open world Zelda was more like Twilight Princess...well I paid $40 used for the game and even that felt like a bit much.

Likewise, I didn't own a computer, but I bought a $1000 computer just to play Ultima Online.  Technically the first online game I played was Diablo, but it was hacked to hell (pun intended).  Ultima Online was the first stable and playable online game I ever encountered.  It was also my first MMO.  The whole experience was just overwhelmingly amazing, and that was the only reason I bought the computer.  (Yeah I tried to justify the purchase, but mostly I used it to play Ultima Online).  So if a game is good enough, I know I can go up to $1000, but it has to be an amazing, never-encountered-before, experience.

So here are some games I'm looking for:

1) A full RPG with exploration and quests and an awesome story, but the battles play just like Final Fantasy Tactics.  The best I can describe it would be an RPG worthy of FFVI or Octopath Traveler, but the battles are like Final Fantasy Tactics.  $300

2) Start with a 2D game like Link to the Past, but with modern graphics.  I want this game to have both a "story mode" and a "random mode".  In the story mode you go on an amazing adventure through tons of different terrain: Desert, Jungle, Outer Space, Back in Time, etc... and a fantastic story develops and you go through it.  "Random Mode" is like story mode only the overworld and dungeons are randomized and you can choose map size and difficulty, but the story is deemphasized.  The combat needs to be amazing with a huge variety of items that all help your combat ability in some way. $500

3) An actual 2D Mario game hand crafted by professional developers.  It needs to have the feeling of exploring different worlds like Mario 3 did.  It also needs to have modern graphics and tight level design like Mario 3 did.  It needs to have a bunch of powerups I've never seen before.  $250

4) A Katamari game with music and level design that was at least as good as the first Katamari game.  It also needs at least 50 hours worth of content before I get into repeat play.  Every level needs to be highly polished and fun.  $350

$30,000

And then I'd wait wait 6+ years for it to never come out! :D

Depends on the kind of game. I've spent over 2000€ on Rocket League and it was definitely worth it.

The dream game that is not RL would be a new Gothic game that is bigger than all the previous games, retains all the things that made the games great while ironing out the jankiness. I'd pay up to 1000€ for it because I already know I will spend at least 1000h with it.

I've been enjoying reading these so far!

Why is $80 the lowest number in the poll?

I'm not willing to pay more than $48 for any game. That what a full price game costs me right now at Best Buy. There is no scenario I can think of where I'd pay more than the prevailing market rate.

And, yes, I do understand the OP and the poll question.  

I'd pay good money for a completely revitalized 2D Mario, new graphic engine, new music, new power ups, new moves for Mario.