A couple of these have been listed on eBay recently, maybe as people saw them and realised what they'd got in their garage or shed.
I think they're underrated, though probably not as desirable as a Big Daddy. Might be worth snapping one up if you have the cash & the space.
Spoke to James White at Southsea one year, he rated his. Said it was pretty much rideable straight out of the box; his personal ride was virtually unaltered, which is really unusual for a flatlander.