Increasing prices for fencing horses and wagons

[NiftyPower 0]

Would it be possible to increase what the fences will pay for horses or wagons?  The prices do currently seem to be generally agreed to be far too low, especially for horses.  The fencing of these items do seem to be a different system than typical commerce, so it might be doable without disrupting other mods.  I don't actually know, which is one reason I am asking.