Alaskan King Crab Legs Online?
If you want the absolute best seek out Paralithodes camtschaticus, Alaskan Red King Crab. It is pricy but is the best. Wild Alaska Smoked Salmon sells 4lbs for $181 here:
http://wildalaskasmokedsalmon.com/Giant-Alaskan-Red-King-Crab-4/M/B0006GX3WA.htm?traffic_src=froogle&utm_medium=CSE&utm_source=froogle - Or through Amazon by the same company for the same price.
I first heard about Red King Crab in the Rosengarten report back in 2004 or so. He recommended City Fish Co. They sell 5lbs for $239 including shipping:
You won't go wrong with either.