My current Agatha Christie fad has got me haunting charity shops and second-hand bookshops again. She's popular enough that I'm often likely to find something, and I am simply not going to pay agency ebook prices for a story I've probably already seen on tv. It also seems to be the case with Christie that there are omnibus editions in paperback that aren't available as ebooks and are better value even before discounting.
I bought three more Poirots today. I should probably read some of them soon.