There are always going to be big spenders and people forking over crazy sums for things other people wouldn't consider, and while they're in the minority, there's quite a variable range in this hobby. You've got people spending $500 on headphone cables alone, spending $5,000 USD on phono cartridges, spending $100k+ on speaker installations. As far as head-fi goes, an Orpheus rig will set you back $25,000 USD or thereabouts. And there are people willing to pay this.
I've spoken to quite a few head-fiers who have said they'd buy an R10 if it weren't for its risk factor. If Sony were to release another limited run of them at $4000 USD---or even $6000 USD---I'm pretty confident they'd all sell out in a year or two.