Ha--you bet. They're somewhat of a piece of Beeman AND air gun history. For a time they were sold as Beeman Silver Jets. They're sort of famous among older/knowledgeable air gun fans.
The now-famous Beeman catalogs of yesteryear described them as something on the order of, "almost appear to be lathe turned", something like that. (All of my old Beeman catalogs are gone so I can't duplicate the wording). Of course, no one could really afford to buy pellets that were produced on a lathe, one at a time. That said, the manufacturing process WAS reportedly somewhat of a secret that was kept by the Japanese company that made them. Robert Beeman claimed that the main reason he could buy when others couldn't is because his wife, Toshiko, was of Japanese ethnicity. The implication was that it gave him a foot in the door of a society that is fairly-well acknowledged for having what might be called a bit of 'societal faithfulness' for lack of a better word at the moment.
Due to the pointed shape, they were touted for their penetration. I found penetration to be decent-enough. Superb accuracy based on design and uniformity was also a claim, although I for one never had a rifle that shot them with excellent accuracy. Fairly-good accuracy, yes, but other domed pellets usually out shot them by at least a little IME. Next, the rings you see around the pellets were claimed to be be very-efficient at not wasting any air, and in that regard I found the claims to be true by a modest margin in the rifles in which I tested them. That is, they usually produced FPE at the top of the ladder when it came to the also-rans.
Some people really have a sense of nostalgia about them, if not always so much for their performance as the almost magical aura surrounding them that I just described. I was able to sell some of them in full Beeman boxes 4 or 5 years ago at collector-like, upscale prices.
My advice: keep them, for the reasons I and others have suggested. They make for a good conversation starter among those who like to shoot, and you may never find any of them again (at least not at a price you'd want to pay--watch Ebay and you'll soon find out what I mean).