Thank you all for the very helpful responses! Facebook doesn't seem like an option then, and Craigslist, eh, I'm a shy guy, would rather not meet face to face hehe. So I'll try out Ebay for selling MK8. Risky but I would think the scammers have bigger fish to fry... hopefully! Everything else I'll just dump on Amazon, the prices are good enough for me.

Just make sure that if they are a) giving u their life story and b) something smell's fishy, you cancel the transaction. Also make sure that you only ship it after you checked that they have indeed transfered money into your account and not just you have an email notice. Oh and certainly make sure that you take a picture of everything as a backup such as any codes that might be on the disc and take a picture of the back of the disc that shows scratches and etc.

Trust me when I say, it's better to be safe than sorry. The scammers target new inexperienced people rather than people who already have a reputation.

this is generally a good idea.  The stuff that will sell slowly should probably go on amazon.  MK8 will sell immediately at the right price, and would be an easy craigslist sell, but if you won't do that then ebay is better than amazon for MK8.

Yea i forgot to say that new sellers are the biggest targets of scammers and amazon won't have mercy on you. If you are targeted you will lose unless the scammer screws up big time. Still most people are not scammers but be aware.

net auction.

Ah good point, didn't think of them preying on noobs. I'll be sure to take all these precautions, thanks mate!

Yeah sadly I doubt anyone really cares about something like Kirby Rainbow Curse. What do think would be a good price for MK8? Can I really go as high as $40? (I see it's being bought around that price). I was thinking of doing $30 so it's a quick sell.

It's trending at $30, if you have it in excellent condition and you put up some good pics you could stretch it around $40.  I would put it at $35 with free shipping if you have it in good condition.  You can't sell mk8 on amazon without being approved, amazon can be really frustrating, you could easily get $40 on amazon but only big sellers can get approved.

https://gameovervideogames.com/

The battle mode was atrocious...it was enough for many people to not give it 90+. The great battle mode, 1080p resolution, 60 fps, and amount of content makes it a solid 90+ game now

Forget the trade-in system, just sell directly on Amazon. They have a pretty nice system in place, I've used it to sell a ton of my old games and have probably made somewhere in the ballpark of a couple grand just pawning old games and consoles.