I would say not, im sure you could find cheaper many people have them that dont know what they are worth.
My brother worked for Apple when they were first producing the G3 iMacs, he was some kind of manager of operations when they actually made the macs here in california... anyways i had a set of about 6 different Think Different posters... At the time i was about 14, needless to say they were all torn.
My uncle also has a few... Honesty i would post a WTB in Craigslist im sure you will find somebody.