I, too, was looking for the inevitable "minimum purchase requirement" (which from experience with other stores/offers usually turns offers like these into a 10% discount - $100 off on a purchase of $1000 or more... big deal!).
However, I've gone over the mailer a couple times (even with my reading glasses on), and haven't located any such words.
I also applaud B&O for making the special on Saturday - I don't do Black Friday - even for $100 off B&O.
I need another BeoCom handset... have been waiting patiently for a "open box" deal to show up at my dealer, but I'll take new for $100 off, or possibly some Form2 headphones for free - this all sounds too good to be true...
With respect to the BS3, I really like mine. I use it in the kitchen, when I exercise in my basement and by the pool. I also bring it along for household chores (cleaning the garage/basement, yardwork, etc.) It's a great *portable* radio. It's light, has a small footprint and the battery lives up to it's published life (6hrs of continuous play at a reasonable volume is not a problem - even after 2 years of regular use). I also used it once as an alarm clock because the power had gone out during the night, and I *had* to get up on time so the battery operated nature was great. My control panel did freak out after about 1.5 years, but it was replaced under warranty.
Downside: no AM, no AUX input, no Remote control. I recall people complaining about using it as a their daily alarm clock - I think you need to turn it on every night, and something about snooze vs. off being an issue (without buttons to feel - it's easy to hit the wrong spot, especially when your sleepy).
It is a mono speaker (the headphones output stereo). I don't think this is a problem. The speaker sounds very good, and I believe the single speaker/amplifier extends the battery life - given the small cabinet, I doubt stereo would add anything. To get around the lack of an Aux input, I ended up getting an iTrip so my wife and kids could use their iPods with it by the pool - this works great (I got tired of fighting format wars - the BS3 cannot play downloads from iTunes music store - unless you convert it to mp3 which requires burning it to disk - by the time I did all this, the song was "played out").
It's value is really as a portable radio, or if you don't have room for something bigger (like in my kitchen - although, since, I've installed a BL3500). For stationary placement, the BS1 (imho) is well worth the extra cost.
Stan