This is the lowest price this one has fallen to, beating the next best offer by around a tenner. I must admit that returning to this one after so many years had me conflicted. The graphical improvements really give the visuals a new lease of life, and the central gameplay - where you build up a base C&C-style and fight alongside units in first person mode - is still great. The issue is that the controls really have aged when compared to modern titles, so it will take some getting used to if you're a first-time player. Otherwise, it's a blast from the past I'd heartedly recommend.
Another quick note - the Red Odyssey expansion is also on sale at £3.49, which is also the lowest price I've seen for it.