When BLT's base price was increased in October 2009 from $112 to $120 a point, there was a drop-off in monthly sales (see dizfan's post re monthly sales totals: http://www.disboards.com/showpost.php?p=38434702&postcount=199. However, sales have rebounded and current sales are beginning to match those sales made prior to the October 2009 price hike. Keep in mind that most buyers don't pay the full base price. On another thread, someone is reporting that new buyers can get 160 BLT points at $117/point and they also get a $500 gift card.
I suspect BLT won't maintain its current sale rate of 200,000+ points a month. But even if its monthly sales drop to 150,000 points, BLT should sell out around September 2011.