For those considering buying a portaledge here are some ideas about the prices, weights and merits of some double ledges currently available.
Black Diamond Perch: 13.5kg with fly. $1400. Don't bother unless your sponsorship extends to helicopter, porters, and a dedicated hauling team to ferry it and you around.
Metolius Bomb Shelter: 10.5kg with fly and haul sack. Block corners. $1400. Solid. Both this and the BD use a spreader bar which make them much harder to set up.
Durango D4: 10kg with fly and haul sack. Curved corners, very solid and easy to use design. $1700.
Runout Customs. Evolution of the original A5 design: Block corners, no spreader. 4.2kg with haul sack (c. 6.5kg inc. fly; weights vary a little with iteration, check with Paul). Last price was $1600 but no longer made.
D4 Delta 2P: Isosceles trapezoid shaped, curved corners. Innovative design and reportedly very robust for the weight. c.6.5kg. $1750, occasional special order availability.
G7 Pod (inflatable) x2 plus alpine shelter fly: 4.2kg, $2470.
For further comparison, a second-hand 1990/00s A5 ledge with block corners and no spreader bar is lightweight (c.7kg), fairly solid and pretty easy to set up. $500? As Alex Waterhouse and Billy Ridal found, an original fly will now leak.
The Runout ledge would be a great option anywhere other than arctic or super-alpine walls.