MOD EDIT - now down to £14.99, was £19.99 when I first posted.
Sorry guys, can't comment on the show, having never seen it, but I can say that it is a good price for the first series of Survivors. This is priced at £19.99 from HMV, with 7.5% quidco.com cashback (about £2.20 extra) and the cheapest elsewhere is about £27...
Details: Conceived by Dr Who's Terry Nation, Survivors is a groundbreaking and startlingly realistic television drama series. First aired in 1975 at the height of the Cold War, Survivors' post-apocalyptic storylines immediately gripped the imagination of the British public and remains compelling viewing to this day. This digitally remastered DVD release includes all eleven hours of the first series.
Includes the following episodes: The Fourth Horseman, Genesis, Gone Away, Corn Dolly, Gone to the Angels, Garland's War, Starvation, Spoil of War, Law and Order, The Future Hour, Revenge, Something of Value, A Beginning.