I suppose. I hardly ever get rid of any, if that's what you mean.

Not really, though in the case of series, once I have one or a couple I do try to get the rest (unless for some reason I'm only interested in one or a couple of the series), in the same edition if at all possible.

I've never sold a book. Nor given away very much, so yeah, I guess I keep pretty much all the books I acquire. But then I don't acquire books at such a very fast rate.

Yes. I'm starting to buy more now that I have a regular income, but still I couldn't do without the library.

Definitely. At the end of the day I don't care too much what a book looks like - not enough that I'd spend much more money on a nicer-looking or newer copy, anyway. So if I can get a book I want, or a book that seems interesting, in a used bookstore, for a cheap price, I certainly will. Though sometimes I guess I get overenthusiastic and buy books I never read.