Well, from what I’ve seen, it’s worth a few hundred dollars at most (about 200-400, usually, but I’ve seen it on websites for as much as 2000). Well, if this card is what you’re referring to (in English though, I presume):
You can sell it on places like eBay, or you can find a special TGC website, where you can sell your cards. You could also try to find someone and meet them in person, but I recommend a website.
Also, that’s a super good card! Congrats!
Hope this helps! :)