How do you know if something you're trying to sell on eBay to another country is legal in that country?

If I were to decide to sell stuff on eBay, but overseas, how would I find out if the item I'm trying to sell is legal in that country?


Eg, kinder surprise eggs are legal where I live but apparently illegal in places like America,

I wanna know because I wanna be able to double check everything I sell and also wanna keep myself out of trouble 😅