ITT, we give others a heads up if there are any BP-related products listed on Groupon. This time last year, someone on this forum alerted others that there's a Groupon deal going on for the emwave2. I was lurking around the forum at the time, and I was able to pick up the product for a great deal of only $100. Thanks to whoever started that thread.
IIRC, there were some blackout curtains up for sale a while ago, too.