Edited the title (I'm sorry, but titling this as POP:TT $20 @ BB was ridiculous), but this is basically a combination of several already posted deals.
[quote name='Final Starman']Some CCs may also accept competitors coupons so you may be able to go directly to CC.[/QUOTE]
IMO, this method has a better chance of working. I've been denied using a competitor's coupon on top of a sale price at CC in the past. And I've been denied using a coupon on top of a PM at BB in the past as well. So obviouly both options are YMMV.