Tube? For me - ship flat. Pay extra if needed. Never roll. Ripples go on for ever...like in the great oceans.
Oh, I read "signed album" - my mistake. In that case, you want as large a tube as possible - less "turns". Signatures on the outside lest you crunch ink/paint pen etc. Same goes for rolled oil paintings. Not a good idea, but if you must...image on the outside.
If I remember correctly, that Poster was somewhere North of 3K. You could do a lot better! Pearl Jam isn't really my thing, but if your Patient, you can get a much better Deal than that.