[Agent Smith]

pawn Код:

if(!strcmp(cmdtext, "/buy", true))
{
    if(GetPlayerMoney(playerid) >= 6000)
    {
        GivePlayerMoney(playerid,-6000);
        ///And all other things you want the command to do.
    }
    else return SendClientMessage(playerid,color,"You don't have enough money!");
    return 1;
}