Amazon wants to hold previous books "bought" as hostages. If you want to re-read a book you "own," then you need to buy a new kindle. Screw that! If there's a class action lawsuit to get us all DRM-free copies of our books, I'll sign on. I don't want a partial refund, thanks, just access to my purchases.
It's time to jailbreak older kindles. They might not work for Amazon anymore but that doesn't mean they have to stop working for the owners.