Unfortunately a sign of the modern times,doesn't matter what price you sell for,most folks will borrow it off some one or even buy it themselves and then copy it.
Then go to pound shop buy say,20 blank dvds copy the original and sell the copies for £2:00 each...people will buy because they are cheap...and with today's technology are great copies...so the guy who copies makes £40 for basically sat on his pc...then they get streamed etc etc
Good luck with it JD ?