Yellow Fins comment of $500 for a tuna bag made me realize some people may not realize what I posted.
The Marlin Combo is 2 smaller bags (30" x 9') that will independantly hold up to a 400 lb fish. When zipped together it will make one giant bag (5' x 9') that holds up to a 1200 lb fish.That comes out to about $225 a bag.
If you are serious about getting the best price at market be preparred by spending a little money. Almost as good gets almost as good pay (not top dollar). With this setup you will be diversified to were you can properly store a giant blue fin to reach the market. If you catch a smaller blue fin you can store him in one bag and use the other for some Yellow Fin to take to market.
PS. The most invintive thing I have heard of was a few years back when a vessel landed a giant blue fin. They did not have anything large enough to store the fish in so they blowed up the inflatable life raft and put the fish in it. The anglers had filled the inflatble raft with the raw water wash down and put in ice to keep the fish.