forget the possibility of it ever increasing in value. would you pay £130 for it? if so buy it and if it goes up or down it doesn't matter, you got what you wanted at a price you were happy to pay. obviously an increase would be a bonus.

i don't know how many exist but you could quantify the relative value by that. the last one on ebay was up for around that figure and didn't sell. i'd happily pay half that but it's you're money.

i think they're folded too BTW.

The last couple have sold around the £60 mark, this one although unfolded a little overpriced IMO. However before Xmas they were acheiving around £100. As for investment if you like it buy it and enjoy then the value will not really matter!!

try your luck, you've got nothing to lose and may get a bargain. hit him with a quick sale @ £50/60 and then leave it up to him. if he says no be patient and he may come back if no one else stumps up.
you say towards a nicer print, unless you've got money to burn on a load of stuff i'd only ever go for something you love. never buy for the sake of it, for the same money this one wants you could get plenty of prints from other artists, i'm looking at james cauty at the moment - this forum and their recommendations are gonna bankrupt me!

It was only two years that I saw about 2000 of those posters sitting on the Greenpeace desk at the islington charity fair, I got one, just don't know where i put it! I reckon some Greepeace activist has got a fortune sitting in their attic and they just don't know it. Either way its a great image and very rare to be seen flat on ebay. I don't think its a bad price considering it's a very unique and special example of Banksy's work. Although you could try making an offer maybe.

ive offered 65, we'll see!

except they cant come back to you unless you email them as they dont get to know who you are!

£100 doesn't seem to bad, but I would be worried that someones gonna just printing these off and selling them.