I remember reading somewhere that a VHS tape is supposed to have a shelf life of 15 - 20 years (the range depends on how well it's taken care of, and how often it's watched). The same applies to audio cassette tapes, since both media are magnetically stored data. DVDs and CDs, on the other hand, are permanant and digital, and will in theory last forever if they are properly cared for and stored. My question is, how is your VHS collection holding up? Do you have any really old, or often watched, VHS tapes that are showing signs of deterioration? Are the above numbers realistic, or are VHS tapes capable of lasting much longer than this if properly cared for?