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If you're looking for something to protect your car, I suggest a nice cover and a battery tender. Unless you're preserving some type of classic car, I think these capsules are over-kill.
99% of all automobiles are depreciating. There is a another thread about a 2003 Anniversary Edition coupe with 8 miles on the odemeter that just sold for $31K or approximately a $20K hit in depreciation. The second owner got a pretty nice deal. The first owner, not so much.