I save the 1987's, all mint marks. I also hang on to the nice proof coins, maybe try to turn a profit on them sometime. If you start saving all of the post-2001 NIFC you'll soon find you've tied up your entire CRH bankroll. They're more common than you think, at least they are for me. If you're interested in completing a date/mint set, I'd do that and toss the rest.
What's special about the 1987s?