This one flummoxed me I'm afraid. With the advent of eReaders and the fact that I tend to buy new books, rather than secondhand, I don't know if I have any that are out of print.
The closest I think I can get to that is Miss Pettigrew Lives for a Day by Winifred Watson. It was originally published in the 1930's, and out of print for a long while, until 2000, when Persephone Books re-printed. I for one am very glad they did. It's fabulous and gave a single 40 year old (me) hope for the future.
was looking for a copy of Rabbiting On from day 7
on Amazon (mine is old and battered and the cover is barely hanging on, and I’ve written on the inside my name and class number at school). Anyway, I figure it has to be out of print now
(originally published 1978), as only one new copy is available, priced at just
short of £2500!!! Used copies are priced
Sadly mine is in such poor condition it probably isn't worth more than 1p at best.