Not sure if it's a Little Genius or not, but to me $400 seems high for a plow without a tail wheel. I think it's probably mostly useless without the wheel.
I was looking for a plow for my H last spring, and would have preferred a 2-12 Little Genius. The 2-12s are a little pricey but I could buy a 2-14 Little Genius in good condition for more like $350.
I ended up with a John Deere #52 2-14 plow in working condition for $225. I did have to cut off and replace a couple bolts to adjust the plow for the width of the H. My 44 H with a single set of weights pulls it in clay without a problem.