Recently, I've been thinking about buying a Super Nintendo to play Super Mario World and other games in a RGB TV
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As you can guess, it's difficult to find one in good conditions, and finding games is really hard too.
I could use an emulator, I could buy the mini version, but noo... nostalgia kicks in and makes me want to buy the real deal. WTH? 

Good call man! RGB is the best way to play vintage video games. Sadly it was never used in the U.S on mainstream TV's. I have a Super Nintendo hooked up via S-Video, which is the best option we have in the states, without modification.
Finding a Super Nintendo should be pretty easy, even in really good shape. The games are also relatively easy to find, although certain titles can cost quite a bit! Luckily, a lot of the popular first party titles have gone down in price significantly since the release of the SNES Mini. I would check out Facebook marketplace and craigslist before jumping on Ebay. Try to buy games in large lots and sell/trade of the games you don't want! I was able to do this when I first started collecting seriously, and was able to amass a collection of over 500 NES games with little money spend out of pocket!
Good luck!
Oh... and to answer your question, video games from my childhood is pretty much the only thing I'm nostaligic about. lol