From all the hondas that people toss(for misc reasons) and the nearby shop(for the same reasons), I have a trans sitting around if u r interested.
"Anyone have any experience with this?" NEVER buy the honda that has variable speed. It works using friction plates that wear out. According to the parts diagram honda only sells the full gearbox and not the parts that wear out to replace it. The ones i find have the white "butterfly" control handle. "Danger Will Robinson!!" 99% of the time i find them, that is the problem and they are only 7-8 years old.
The ones that have a set # of speeds have gears- thus gears shouldn't wear out but even those i find broken now and then.