I want to buy Minecraft for less than 10 euro. Sends links where you can buy some.
For which platform?
PC Java / PC Bedrock / PS4 / Xbox / Switch / Mobile? You have to be more specific.
PC Bedrock or Java Windows 10
Do you want the Java or the Bedrock?
If you want the Java, then unfortunately I have to disappoint you. These are only available on http://www.mojang.net and can only be bought directly from there. With the Java version you don't buy a KEY, but an ACCOUNT. This is the only way to play Java.
There are also supposed to be people who sell old Java accounts, but I have to advise you against it.
The Windows 10 Edition (Bedrock for PC) can (I also have) buy it for a few euro on the Internet, because you need a KEY to redeem it in the Microsoft Store. Back then I bought the Windows 10 version (Bedrock) for 2 euro and it works too. And even if something goes wrong: it's only 2 euro.
REMEMBER that with Bedrock you can ONLY play WITH BEDROCK and with Java ONLY WITH JAVA players.
Minecraft Java costs 23.95 euro
Legal nowhere and alts like to be banned on servers. There are also various accounts for 2-3 euro, but you don't have full access and the original owner can get the account back at any time.
In summary, buy the original on Minecraft.net and have no problems with your account.
Mojang.net doesn't exist, it's mojang.com and it leads directly to minecraft.net
Can you send me the link where you bought it would be nice.
EDIT: There are also reputable providers who sell the Java below the standard price, but only very rarely for less than 10 euro.
Fact I'm sorry it's of course http://www.mojang.com/...mojang.com.
