Are you even remotely prepared to house/care for/feed a LMB? You better plan on having a consistent supply of live fish on hand at all times, lots of filtration, and room to run. My LMB (about 11") can and will eat 20 minnow in one sitting. He goes absolutely bonkers and will jump and splash like a maniac. 2 hours later, he'll be hungry again. He will steal worms from the other fish and is extremely dirty. A LMB is not a goldfish. THey have attitudes, are aggressive, and get BIG. They're not game fish for no reason.
I find it amusing these are actually bought/sold now. I can't imagine going into a store and asking for a bass. But whatever.. good luck and please dont kill an innocent fish you can't care for (if that is the case).