Bought a Cub 122 today with a 540 pto adapter on it.
 

Is this unusual? I've never seen one. The PTO, I've seen, but not this adapter on it. Its bolted on like the real thing.
All ready sold it to a collector at the auction, but any Idea what I should have asked? Kind of late I know.

that just looks like a reverse box

YUP...that was an Aftermarket PTO Reverser. It was needed to get rear implements to run in the right direction on Cub Cadets. And yes, they are kind of rare.:IH Trusted Hand:

I have seen the gearbox alone on eBay bring about $300-500, and the PTO rearend about $400ish.

Nice find, ABC! :beerchug:

Well, I'm not rich. I couldn't figure out how to remove the box without taking a chance at ruining something, and I had already sold it to a guy, so I just removed the transaxle and let him have it all. Looked like a gear & bearing were pressed onto the shaft of the inner half of the reverser, and removing them is what had me chickening out. So he got a great deal, and i still ended up with a frame, new foam seat for something else, engine, chrome stuff, new clutch parts, 2 new rear 12-12x24 ags, widened rear wheels, and new tri ribs (which are already on my 100) for $100.