ALR's This was a prime target of my own, but to my surprise, I had way too much opposition and could not get rid of this shelf hog. Something to keep in mind. The following are all examples of a series of something. You may only need a small portion of the series, so you could use one of the many brands of document delivery when a particular portion is actually needed. Otherwise you have row after row of uniform looking books with little redeeming value except maybe their good looks.
Case reporters Are a good example of the type of material that can be pitched.
Even though I have users who did not like the idea of not having, for example, all of the federal reporters in paper, we did away with a good chunk. I kept the last 20 years of F.3d, F.2d, F. Supp. I have fiche for the very oldest volumes, but there is a gap and I refuse to buy more ultrafiche to fill in that gap. We must use online services instead and that has worked fine so far. With some sets, like the Ohio Attorney General Opinions or the NLRB Decisions, I have kept only what we cannot find online.