A lot of people have already been receiving this poster by Guy Burwell and amazingly the poster has not yet sold out and can still be purchased at DamonCarltonandaPolarBear.com
Meanwhile if you are still making your mind up here are some close up views courtesy of RamHatter and JPL who have their posters.
I am reliably informed that the gold ink used to print the posters is very striking and that the detail is superbly crisp and clear.
Personally I'm still not sold on the mechanical / harpoon hand that Locke is holding out with the black and white stone. However the detail is certainly superb having had a look at the close up shots.
One of the numbers circles from the cave and after Jacob's campfire chat it isn't surprising that one of the other circles contains number 51