if (strcmp(cmdtext, "/purchase", true)==0) // To buy a vehicle. (It will say Unknown Command, but anyway it works) ;)
 {

      if (GetPlayerMoney(playerid) < 15000)
      {
            SendClientMessage(playerid,COLOR_YELLOW,"Car Dealer: Sorry, you don't have enough money to buy a car.");
        }
        else
        {
            if (IsPlayerInAnyVehicle(playerid) == 1)
            {
                ownedcar[playerid] = GetPlayerVehicleID(playerid);
                dUserSetINT(PlayerName(playerid)).("car",ownedcar[playerid]);
                owner[ownedcar[playerid]] = playerid;
                SendClientMessage(playerid,COLOR_YELLOW,"Car Dealer: Congragulations! You've bought this vehicle for 15000$");
                GivePlayerMoney(playerid,-15000);
            }
            else
            {
          SendClientMessage(playerid,COLOR_YELLOW,"Please get in a vehicle to buy it.");
            }
        }
        return 1;
    }