Yikes! But I've also experienced similar sticker-shock in framing prints. I don't know where the cost is, as none of the materials are that expensive, and honestly, it's not rocket science to cut mats and mount posters. Archival glass can be expensive however, if that is what you went with.
I was thinking about ordering a set of posters, but the exorbitant postage put me off. That, and being seriously short on wall space...
