Let's face it, if you buy a new tablet 11 months after your last one just because you like the new optional case better, you're just searching for ways to spend money.
Would be interesting to know where it will end up and how much it will then be sold for in turn.
Uh, actually, I hadn't seriously contemplated this until now. Hmm. Come to think of it, the major hurdle is probably getting this scheme past my SO. :)
OTOH, I could have sold it last month for at least $400, which would be a much better deal but would mean I would have no iPad for one month.
OTOOH, if I keep the iPad 1 another year, it will probably still be sellable for $250, and that is $250 for 2 years of use which is not bad.