[Anwix]

Код:

enum PlayerData
{
	pLevel
}
new PlayerInfo[MAX_PLAYERS][PlayerData];

public OnPlayerCommandText(playerid, cmdtext[])
{
	new cmd[256];
	new idx;
	new Money;
	cmd = strtok(cmdtext, idx);
	Money = GetPlayerMoney(playerid);

	if(strcmp("/buylevel", cmdtext, true, 10) == 0)
	{
	 	if(PlayerInfo[playerid][pLevel] == 0)
		{
			if(Money >= 10000)
	  		{
	  			SendClientMessage(playerid,COLOR_1,"You Have bought level 1!");
	  			PlayerData[playerid][pLevel] = 1;
	  			return 1;
	  		}
	 	}
		else if(PlayerInfo[playerid][pLevel] == 1)
		{
			if(Money >= 15000)
	  		{
	  			SendClientMessage(playerid,COLOR_1,"You Have bought level 2!");
	  			PlayerInfo[playerid][pLevel] = 2;
				flip = 1;
	  			return 1;
	  		}
 		}
		else if(PlayerInfo[playerid][pLevel] == 2)
		{
	 		if(Money >= 20000)
	  		{
				SendClientMessage(playerid,COLOR_1,"You Have bought level 3!");
				PlayerInfo[playerid][pLevel] = 3;
				flip = 1;
	  	 		return 1;
	  		}
	 	}
		else if(PlayerInfo[playerid][pLevel] == 3)
		{
	 		if(Money >= 40000)
	 		{
	  			SendClientMessage(playerid,COLOR_1,"You Have bought level 4!");
	  			PlayerInfo[playerid][pLevel] = 4;
	  			flip = 1;
	  			return 1;
	  		}
	 	}
	 	return 1;
	}
	
	/* Other Commands Here */
	return 0;
}

EDIT: Added Badger's comment.