If each of the types of cables is probably less than $5, how do you get a $70 price tag for the combined all-capabilities cable? I'd be surprised if it would cost more than $10.
Have you seen the prices for VGA cables, cat5, etc. at Walmart, best buy, etc.? They absolutely will jack the price up because they know the only people who buy that stuff there are ignorant or too desperate to wait for shipping.