If one is to say that there is a general average price for iron casting and metal casting, one would be lying but one thing can be deduced straight up and that is the fact that with the many processes used to attain a cast of metal, the prices for casting have immensely reduced.
This simply follows the law in economics that the higher the demand, the lesser the price. Supposing there is only one means of casting metals, it would cost quite a ransom. Been that as it may, it can be inferred that the prices for casting metals or iron casting depends on the type of firm that you are employing their services.
It is to be noted that many firms that are popularly demanded for by many people who deal with all sorts of metal could have their prices inflated because they are properly demanded for. However, the prices given by most casting metals or iron casting firms is always a very good price to be negotiated and this depends largely on the level of relationship that one is able to establish with such firm
Many metal casting firms also have their average prices for varying services on their websites.