Abebooks...

If you love books like me, I'd strongly recommend abebooks.com. They have millions of books on sale, many of them really rare and quite cheap. I know I am hard up at the moment, but I just ordered two new books - an anthology of Bl. Hildegard of Bingen (in Latin with notes) and selections of poems by Catullus (in Latin with notes). They were 81p and 64p respectively...