Quote:
Originally Posted by haertig
I hate it when I buy something that I already own!
Amazon is quite good about telling you what you've purchased from them in the past, so you don't re-buy. That doesn't help you if you routinely buy from different sources though.
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Kobo offers the same functionality -- when you look at the details for a book in your library, the price pane is replaced with a "You already have this title". I don't buy enough from Google to have run into attempting to repurchase so can't say if they offer the equivalent warning.