The first DVD player cost 3 million dolars and was invented by Ian Demoney, he has used this money to disappear and cannot be found. It weighed in at 200 pounds, this was invented in 1993
why was the guitar invented?
Radio controlled helicopters on average cost $50. One can purchase radio controlled helicopters from online retailers like eBay, Amazon, Model Zone and many more.
The radio was first invented in the early 1900's around 1905 and the start out cost was around $30.
100$
I would think that around $40 is an average cost for rc scale helicopters. You can do a compare and contrast on these through the internet. They tell the best prices.
Remote controlled helicopters vary greatly in sophistication. As such, their prices vary greatly as well. Some are as cheap as $40 while others may cost $200.
$0.10
85p
it was 1$
A lot of money
It did not cost money. The very first one was built by the owner, not purchased.