I'm in the middle (okay, the start

) of cataloging my books, I've done the 2 bookcases in the small room, and have hit 400+ books so far.
So given that, I would guesstimate that i've got about another 2-2.5 thousand in the house to get through. I then have a storage unit whihc has
at least two large boxes of books, so possibly another 1000 there.
We keep most of what we buy, but we also do rationalise the library every so often, and either sell the "discards" on ebay or donate to the local op-shops.