public static boolean Exists ( PcParts thing, List<Stock> shopStock ){	
		check = false;
		item = thing;
		for(int i=0; i < shopStock.size(); i++){
			if ( thing.getManufacturer().equals(shopStock.get(i).getManufacturer()) && thing.getmodelName().equals(shopStock.get(i).getmodelName()) && thing.getmodelYear() == shopStock.get(i).getmodelYear() && shopStock.get(i).getAvailableStock() > 0){
				check = true;
			}
		}
		return check;
	}