personally, I wouldn't pay more than $20 for one of these.
I'd pay more than $20, I do think that these posters can be quite valuable, but I stand by my statement that trying to declare your own price that ignores the market demand is poor salesmanship. Let's say I whittle 100 squirrels out of oak branches. I then sell all of those little squirrels for $30 at a local town fair. If everybody who bought one of these squirrels then listed them on eBay for $500, a number they clearly just made up because it is not in proportion to any sale data.
Eventually, some guy might go and pay $800 for a Robocop print, maybe somebody who is not educated like us and know that others have sold for much cheaper. He spends $800, but what if he decides to sell it again? It will be a great struggle, perhaps even impossible, for him to sell it for another $800. Put simply, he was swindled, because all of these items have volatile markets dictated entirely by the person who is trying to sell it.
Yes these posters are valuable and there are collectors who are willing to pay a great deal of money for them. But again, when people who hold them suddenly decide their value is whatever they want it to be, I don't hold those sellers in very high regard.
