There's a bunch of omnibus editions of books at very reasonable price points on the Kindle UK store that I'm getting in my email alerts.
Tales of the Ketty Jay: Retribution Falls, The Black Lung Captain, The Iron Jackal, The Ace of Skulls by Chris Wooding for £3.99
The Complete Lyonesse: Suldrun's Garden, The Green Pearl, Madouc by Jack Vance for £3.99
The Braided Path: The Weavers Of Saramyr, The Skein Of Lament, The Ascendancy Veil by Chris Wooding for £3.99
The Northland Trilogy: Stone Spring, Bronze Summer, Iron Winter by Stephen Baxter for £3.99
Destiny's Children: Coalescent, Exultant, Transcendent, Resplendent by Stephen Baxter for £3.99
Alternate Histories (The Time's Tapestry series: Emperor, Conqueror, Navigator and Weaver plus the Northland Trilogy listed above) by Stephen Baxter for £3.99. 7 books in total.
Behemoth: Silverhair, Longtusk, Icebones by Stephen Baxter for £3.99
A Memory of Flames Complete eBook Collection. This is all ten books by Stephen Deas in this setting for £3.99
The Thursday Next Collection 1-3: The Eyre Affair, Lost in a Good Book, The Well of Lost Plots for £3.99
JAMES LEE BURKE – THE ROBICHEAUX COLLECTION. This appears to be the first 18 books (out of 21 in the series) for £3.99
10 Great Rebus Novels for £3.99. Again the first 10 books in the series it seems.