Well, I just bought a pair and there were other pairs available. In the past, doing tickets at my old club, they'd dump all their singles on us, which we'd happily take. Given the tickets are ludicrously expensive, I doubt I would have done that this time, if they decided not to hawk them out to all and sundry, that is.
I'm with Blucherquin. This is outstandingly poor by the RFU.