We have buying Wagyu briskets at Paradise meats in Trimble, Mo, for the last few years. We were paying around $4 a pound. That is what we had been using in the comps we entered. This year in May, we went to get some Wagyu briskets for the Great American BBQ, and bad news. They no longer sell it. They have something I can't remember the name of, Yogadishu, or something like that, for $8 a pound. That was out of our range, so they showed us some briskets called Vintage. A breed based on the Wagyu. Looked good, only $4 something a pound, so we bought a couple. Didn't win with the vintage at Great American, made the top third, not to bad. Did a contest in August and used vintage again. Much better results this time, 1st in brisket.
The vintage looks and cooks just like the Wagyu. Very forgiving, you can push the temps up in the smoker if you are needing to get it done sooner.
Below is a pic of Wagyu briskets and berkshire pork butts from Paradise meats.
The briskets have fine marbling like prime steak, all over through them. Same with the butts. The Vintage briskets look about the same.
Above is some Wagyu from last years American Royal.
The Wagyu is much more juicy and tender than anything I have tried, other than the Vintage.
If you can afford the Wagyu, treat yourself to it at least once. I really don't think you can screw one up without deliberately trying.