Went to a carboot sale this morning, found out I'd missed out on a box of reggae 12" singles by a couple of hours
then found someone with 15 Phillip K Dick books, thought a £1 each would have been a result - he wanted 10p each for them! And then tried to give me a discount for buying them all! I gave him all my change (only about £2) and told him to keep it - best carboot find for some time, one of my favourite authors along with Kurt Vonnegut Jnr, Jeff Noon, William Gibson, Bruce Stirling (up until after Heavy Weather anyway!), M John Harrison, Alfred Bester, Prattchet and Robert Rankin.
As for favourite book that's near enough an impossibility to pick but if pressed I've always found A Scanner Darkly (K Dick) and The Centauri Device (M John Harrison) particularly enjoyable.