In HMV they're £12 each
In CEX, a place known for real bargains, they go for £10
Most Helpful Guy
I think it's pretty simple 1. these are classic films that people love.
2. the stocks of these are very low on cex and I can only assume they are harder to get than other dvd's e. g. there were multiple copies of the dark knight in every store and the lord of the rings also had multiple copies whereas these films had about one in not as many stores.
Most Helpful Girl
Because they know they can charge that much and we'll all still buy them :P