Rythmik's B-stock sells out instantly. The one and only time I can think of that the LV12R was on sale for a great price was when it was introduced at $549 I believe and they typically don't do much in the way of holiday pricing.
Get the LFM-1EX when it goes on Black Friday pricing because it is usually the best price of the year on that sub.
For your L/C/R the Pioneers were just on sale which means you missed it, and when they are on sale they are typically cheaper than the Infinitys. If Frys isn't local to you, not all of their deals are available for delivery, and pretty much every time I've seen the Infinitys on sale, they were in-store only.
If you keep waiting for deals that you don't actually watch for, you will either end up never buying anything or paying more for it.