Item size - 101.18" x 0.39" x 25.98" (257cm x 1cm x 66cm).
That's the craziest size listing ever - 8ft x 1/2" x 2ft.
I guess they are listing the open size of the poster? Is it folded, or does it have to ship rolled?
Pretty much zero auction houses are like eMovie when it comes to shipping.
And Heritage has greatly streamlined their charges the past few years (I won an item in their pre-Colombian art auction this past week and total shipping was under $17), but outside of that it's a crapshoot.
Most of the other auction houses use 3rd party carriers that charge for picking up, packing, materials, and then a surcharge on the postage also.
It's not unusual to end up with a $100+ quote for a single lobby card from the big two (Sotheby's and Christie's) and all the 2nd tier houses then make it seem like if they "only" quote you $75 they are doing you a favor.
Good luck with your current purchase.