Do the sell snow crab legs by the case here and if do for how much?

I've seen snow crab legs in a frozen sea food section. It's likely they can give you the whole case.

You can check online. Foodbazaar.com. The prices tend to vary and they have a wide variety of seafood.

Yes they do sell the box you have to ask for it in the fish department.

I do not know but you can always call the store in advance of going there to find out.