The irony here is that mercs developed as a direct response to flights who agreed not to raise buy prices during dom battles. Spoiler alert: the fodder floor went up, anyway.

So the proposed solution (i.e. dom battles with fixed limits or buying agreements) is what started that whole train in the first place... because train-exalters who liked dom and normally would have sold to a buy thread couldn't find an efficient market for their leveled dragons.