What's the deal here, why is this lamp over £100 ??

[Modulo '70]

Saw this lamp on ebay but can't believe the price, over £140 and counting! What is so special or is there a mistake?

http://cgi.ebay.co.uk/Original-Mathmos-Lava-Lamp-Retro_W0QQitemZ230...

[Modulo '70]

What is so funny is that it says, 'snap up a bargain now'. RRP £50

[Version-2]

its obviously a push.

There mates have placed bids with no intention of buying it to make more people bid and think that its unique.

its only a astro, nothing special, and personally i would not even pay £20 for it. lol lol