Actually, yes, in a way, there is a swindling going on. Wizards wants to take books that have been paid for at the printers and have been sitting on a shelf for a while, slap a sticker on them with a different bar code and up the price. There's no reason for it other than to add 10 bucks to the price. That's it.
I don't have a problem with increasing the price on a new print run of books as obviously Wizards isn't going to print the same numbers they did previously and, in theory, these would be new errata'd printings. Like I said, that's perfectly fine.
~Derek