RBH speakers are sold through B&M dealers, which means they are most likely sold at a discount. ID speaker prices simply are what's posted, so comparisons are not as clear as MSRPs make them seem. I don't know what typical RBH discounts are at B&M dealers, but in this price class 20% is what I would expect. (5300 x 0.8) = $4240, which is about the same price as the Funk 18.3, a possible competitor.
As I posted before, I was surprised at the price. Not that I'm criticizing it, or saying the product is over-priced, but I expected a lower price. I also expected a lower price on the Revel Rhythm2 when it released, so perhaps my expectations for high-end subwoofer pricing are unreasonable.
I continue to be... slightly perturbed by posts from "value buyers", who always seem compelled to say that they'd rather have two of this or three of that in place of some premium product. To reiterate what I've said before, someone seriously considering a $5300 RBH sub, no less a pair of them, is very unlikely to be cross-shopping it with a pair of Rythmiks.