Why is this DVD so expensive?

In the UK people are paying up to £30 for this DVD on ebay. It took me months to find a new copy at a reasonable price of £9.99 Has it become something of a collector's item, or achieved a cult status?

Over the years, I have heard this three times as a radio play on the BBC - hence my curiosity. Now that I have at last seen the movie and read most of your comments, I am beginning to wonder if it has an especial attraction for the homo-erotic set as well?

For my part, I prefer to take the story at its simplest level, about two war-damaged soldiers who find peace in the countryside. Their values are those of an earlier age where young men do not steal other men's wives, but know what it is to be tempted.