It's not the most powerful Vehicle, but it arguably has the best opportunity cost as you can remove any Manalith variant in your build without pushing out vehicles and it's pretty solid
If you were to pack one or two of these cards, they could pay for the box outright and then some, and then anything on top of this is pure profit, but you'll need to go through the effort of finding individual buyers, as submitting to a general buy list is often not going to get you the best price
For example, if there are two +1/+1 counters on Aerith Gainsborough and it gets three -1/-1 counters, you'll put two +1/+1 counters on each legendary creature you control when Aerith Gainsborough's third ability resolves
Smellerbee, Rebel Fighter has great synergy with our Rebel Tribal as he can be a draw machine
That said, the Commander Bracket system is probably better than the informal power level rankings , or leaving it up to players to say whether their deck is "competitive" or not without any solid criteria