Taking this off topic, but adding to this rip off by the car manufacturers, a friend needed his HSV Maloo key replaced, $1500.00, a basic VE Commodore...$800.00, with Merc...depending on model, from $1500.00 to $3000.00. Ferrari...you are looking at $6000.00 as a base price.
Now these costs are for the key and the electronice security keyless mechanism that is attached to the key, for with some manufacturers, you buy the key body(electronic bit) and the key(metal bit) all in one piece, for you can not seperate. There are others that can be seperated, but be aware there are security coding costs as well to include in the replacement.
So, the bottom line, don't key your keys wet and look after them like gold...