I've had one of these- this one, which I sold to Guy http://www.theguitarcollection.org.uk/guitar/burns-weill-super-streamline-bass-2/
Much as I love old UK weirdos and it looked really cool, it was a total piece of stinky poo as an instrument. HUGE body so it weighed a tonne, but neck exactly the same dimensions as a banjo. The fret positioning was totally off too- obviously hand slotted and pre calculators. The first three frets were the same width, which meant that on an instrument with a 29'' scale it just wouldn't play anywhere near in tune.
Seen one picture of Jet Harris holding one (he was given it by Jim Burns, and Marty Wilde was given the matching guitar, when they were both on a tv show called 'oh boy') and he doesn't look very happy! Pretty sure he played it for about a second then went back to his Framus. Kudos to the guy from Egg for actually managing to use his. He *must* have ended up having to bend certain notes into pitch
Anyway the listing in the op has gone now, so guessing someone paid the 'on crack price'. God knows why!? I've seen two of these in near mint condition complete with original case and they both went for about 400/450 or so. I paid 150, on ebay, and when I got it, it was in about the same state as the auction one- all there but non original finish, which I stripped