What to do with a bunch of old hard drives?

I was doing some spring cleaning, and ran across five old hard drives in sizes ranging from 160 gb to 320 gb. Not bad, as drives go.

But they are all blessed with EIDE connectors, not the (newer and faster) SATA connectors. (The old 40-pin ribbon cable flat connectors, as opposed to the elongated L shape of the SATA ones.)

Some have been sitting for years, Anyone with a PC purchased in the last 5 years has SATA connectors. Short of throwing them out in the trash, is there anything useful to do with them? (I already put one in an enclosure – no more need for another one)