This offer includes the following classics @ £4.99 each - so you could get 3 for £9.98 and first orders 10% off :: £8.99 approx £3 each. There are lots of others on offer as well.
Four to Doomsday (next best £5.95)
Doctor Who: The Five Doctors (Anniversary Edition)
The Two Doctors (next best £4.91)
The Invasion of Time (next best £6.29)
The Sontaran Experiment (next best £4.91)
The Time Warrior (next best £4.87)
The War Machines (next best £5.91)