Seems common practice these days - do a limited super-twiddly edition for those wot can afford it but a regular version will be out for those wot can't. A few rock biogs and so on have come out like this of late.
It's like the Floyd and LAGWAFIS boxes or those gigs where you pay £150 to be in the audience for a DVD taping. Seems to be the way for artists who are reaching (or are past) retirement age and whose core audience are dwindling through enfeeblement or being in some way "more selective" about their fandom. I would lay good money that most of these are snapped up by collectors and that they will be dribbled out on EBay over time. A show of hands here might move 100 at that price when you include fully cloaked lurkers. I would have thought that would be tops.
In any case I do most of my reading in the bath. Wouldn't want water apots on the literary upholstery!