I didn't know that about the rubber jaw MB50's.
I have some duke 2 coil #4's and Im not satisfied. They flex/bend just enough that they need to go to the shop after almost every catch to be tweaked back into shape. Yes, they are the cheapest/most affordable trap but half of mine are sitting on the bench needing work.
IMO, they need at a minimum base plates. center swivel would be good as well. The baseplate/frame will bend just enough(with a rowdy yote) that the dog needs adjusting and one jaw will close a little easier than the other. Might not matter but I can't help believing that that one dragging jaw will either not close all the way, close slower, or torque the trap allowing the critter to get out.
So... to summarize my long winded post, I would rather pay $22 per trap and have it ready to go out of the box not needing a bunch of modifications, than to pay $14 per trap and need to do a bunch of work to it, or spend a bunch of time modifying it.
Since half my dozen duke #4's are out of commission, I figure they really cost me double or $28 each for the cheaper traps.
I wonder if the bridger rubber jaw traps have better jaws than the MB550's ?