I would like to give the user the option to buy a video. However, they can choose to download the video for $10 (and watch it for a limited time, like 30 days), or buy a DVD for $25. What I'd like to do is that if they buy the download for $10, they can then buy the DVD for $15 (the difference in price) if they buy it within the 30 day limited time.
Is this possible, and how?
Thanks,
BP
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