The Yankee tank trick is that the agitation arrows ("Agitate this way only") don't mean to slide the tank sideways, but to rock it. Notice how the tank's feet are offset inward from the ends? When the tank is full, you can tilt the tank on one foot until the edge touches the work surface, then let it down to level again, and get a good bit of solution movement without spilling; tilt the other way, and back to level, and the two-way set is one "inversion" equivalent. Pace those so you get five or six two-way rocks in ten seconds, and that's an agitation cycle, to be done once a minute.
The last time I saw one of the Nikor tanks with the cage it was priced close to the brand new B&W King unit -- but the Nikor has a welded cage, rather than bolted together, and holds one more sheet (6 instead of 5) in slightly less solution. Supply and demand -- fifteen years ago, a Nikor with cage (but missing the band -- they're always missing the band, I think it breaks) was around $100, and the cages were almost never found without the tank. With film and home processing making something of a comeback, they've gone up, just like good cameras have.