[erminpr0]

Didn't understand you well,
is this you want?

pawn Код:

new Materials[MAX_PLAYERS];
YCMD:getmats(playerid, params[], help)
{
    #pragma unused help
    if(!IsAnArmDealer(playerid)) return SendClientMessage(playerid, 0xFFFFFFAA, "ERROR: You are not allowed!");
    // You should change it, put variable instead of this check.
    else if(isnull(params)) return SendClientMessage(playerid, 0xFFFFFFAA, "USAGE: /getmats [ammount]");
    else if(params < 1 || params > 10) return SendClientMessage(playerid, 0xFFFFFFAA, "ERROR: Ammount of materials can't go over 10 or below 1!");
    else if(Materials[playerid] + params > 10) return SendClientMessage(playerid, 0xFFFFFFAA, "You can't hold it!");
    else if(!IsPlayerInRangeOfPoint(playerid, 4.0, X, Y, Z); // Your co-ords
    return SendClientMessage(playerid, 0xFFFFFFAA, "ERROR: You are not near mats selling place!");
    else if(GetPlayerMoney(playerid) < (params * 10)) 
    return SendClientMessage(playerid, 0xFFFFFFAA, "ERROR: You don't have enough money!");
    GivePlayerMoney(playerid, - (params * 10));
    Materials[playerid] += params;
    new myString[128];
    format(myString, sizeof(myString), "SUCCES: You have bought %d crates of materials for $ %d", params, params*10);
    SendClientMessage(playerid, 0xFFFFFFAA, myString);
    return true;
}