we've got an 'earthbound', cartridge only that is in excellent condition, but i love that game too much to ever part with it (one's going on ebay right now for $123.50 with about 14 minutes left to go.

i got two cib's of that but i dont ever think id part with it myself

earthbound is awsome but i didnt get in to the 1st one but loved the 2nd and 3rd

Secret of Mana is weird at least I have followed it. The pricing is all over the map. My complete nice copy was $35 which inluded the manual, box, and map but now I see copies going for $70+. Good luck to that guy for getting $2500 for it, it's not even rated a 90 but maybe some collector would pay that?

i beat mother aka earthbound 0...its hard as heck. of all the staff on starmen.net only one of them has beat it and i wont say who to save the ridicule lol

I was lucky to pay only $70 for a Earthbound copy and $30 for Secret of Mana on SNES. I do have Terranigma as well but its Super Famicom version. But still only paid $30 and even got the manual as well.

I payed $5 for a cart of Ogre Battle 64, in pretty good condition.

i payed 20$ for secret of mana
and this not happening http://www.ebay.com/itm/Chrono-Trigger-Super-Nintendo-Archiva...

You know a game like earthbound is good when you reach for your wallet and it's 150 dollars. Also the adventures of tron bonne is pretty expensive.

Also if you play a game with monthly fees 5 years comes to about 1500 dollars.

Oh yeah! Speaking of the Bonnes: I have Megaman Legends 1 with the manual! Last time I checked on eBay it was going for really unfair prices. Disk only was cheaper, but still just a bit too much for the game. I was surprised to see it was rare.
Guess that's my rarest game. Huh, who thought it'd be a PS game?

I picked up a lot of games that included Final Fight 3, Mario All Stars, Super Metroid and others for $10. Final Fight 3 is the only one that seems to be somewhat rare. I picked up Mega Man V for the Gameboy for $5 and IV for $8 on Ebay of all places maybe 4 years ago. I don't think I have many rare games, but I do have a few games that demand a relatively high dollar value.

Oh yeah, I happened to be driving to through a small town and a guy had Banjo-Tooie for $10.

Metal Warriors aint got nothing on a brand new sealed copy of Bubble Bobble 2 which will run you $20,000.
http://www.ebay.ca/itm/Bubble-Bobble-Part-2-Nintendo-NES-NEW-...

There was also a used copy 'Cart only' up for sale which went for $300.
Oldgamesonly do you happen to have this bad boy in your collection or anybody else for that matter?

Ok why is that game so much was it due to limited copies?

Right now the only game I can think of that I have thats kinda rare is a gold copy of OoT on the N64 that has the original Fire Temple music and red Ganon blood.

@Tasuki
Most likely.
As for me, i think the most expensive retro videogame i have in my entire collection would have to be my 'New & Sealed' Copy of T & C Surf Design for the NES....Actually, it's not sealed anymore hehe. I couldn't resist. I ended up opening it on a kickin' hot & sunny summer day and the experience made me almost feel like i was a kid again opening up a brand new fresh NES title for the first time. I only payed around $60 for it too at the time which i think might of been around a year ago.

the next expensive retro purchase I'd most likely make, when i do...Would be Super Mario World CIB. They usually run from $90-120 depending on the condition. I already have the cart, but i want the box/manual and inserts. Then that leaves me with Super Mario Sunshine and whalla' I'll have every single main Super Mario title in the franchise CIB.

I got an EarthBound cart I paid like $30 for because I bought it before the hype, when that was about the typical ebay price. But I'm not selling.
I got a complete copy of an RPG called Gokinjo Boukentai, a Super Famicom RPG that's sort of an RPG/life sim. I hear it's worth like $80, got it for $30, possibly because the box and manual are in somewhat poor condition.
I won a Chip 'n Dale 2 cart in a non-ebay auction for $10.

My collection of PS2 RPGs I bought new but haven't played probably would be something if I left them sealed but probably won't.

Mega Man Legends prices do seem to be all over the place on ebay, though the N64 version seems to be pretty worthless (like $20 sealed)
Super Mario World, definitely the box is the valuable part, there's tons of carts and manuals out there. Since it was a pack-in a lot of them didn't include the box, and because it's popular a lot of the people that did buy the boxed version probably tossed the box.

I paid like 150 AUD for a mint condition Paper Mario 64 a few year ago (with box and etc)

Mind you, I probs overpaid. But I didn't see too many of them come up for sale in Victoria (or Australia generally) back then so when I saw it at that price, I was willing to pay it. Bet they are more available these days though, due to the success of the others in the series.

I also found it difficult to get a copy of Eternal Darkness; but I prevailed
Secret of Mana is also in my collection, with box/booklet and the game strategy guide.

http://www.computerandvideogames.com/191868/features/25-rares...

I hate it when sites get their info wrong. The US StarFox and Donkey Kong Country competition carts were only sold in a catalog (I think it was called the "Super Power Supplies Catalog") sent quarterly to Nintendo Power subscribers (and the original price of the StarFox cart was $45).
But those prices... did they just look up the highest ebay BINs? 2008, that was probably before the collapse of the US dollar, so let's average it to 1£=US$1.75. $262 for Ninja Gaiden Trilogy? I'm doubting it was actually selling at that point. Pretty sure at that point you could easily get a cart for under $40.
I don't think I've ever seen a copy of Surprise at Dinosaur Peak actually in rental condition. Is this to say that everybody who ever owned the game has gone to the effort of cleaning it (removing stickers and marker) before listing it?
No mention of SD Gundam Dimension War? I hear that's considerably the rarest Virtual Boy game of them all.

Some of you peeps are lucky for what you got some games for. I wish I knew about Earthbound years ago.

@KingMIke: I know Ninja Gaiden Trilogy is pretty expensive. The cartridge alone goes for more than $40.00, more like $60-$80