Yes.. it's the quantity that's the problem! I kinda like the Hershey's Kiss analogy.. may have to steal that one!
I've been looking on line, and traps run in the $125 range. Yikes! Any reason not to use a regular live animal trap? I would imagine that with long term use, rust would be a problem, but by then, hopefully..... no more turtle explosion!

And the reason I am blaming the turtles for the lack of nesting wood ducks and mergansers, is that they stop by, but don't stay. There are nest boxes, and the correct food supply and habitat... so I'm blaming the turtles!! :-))