Well, I'd be interested in a hitch.
A quick web search finds a couple available in the $245~$269 price range, so I guess you'd have to beat that to get any interest.
I'd prefer a receiver type hitch, though it doesn't have to be a "hidden" design, as my rear fender has been cut down. I'd like to remove the ball when it isn't needed, though. And the ability to put some other accessory there would be nice. (Small luggage rack or something) So if the design wasn't "hidden", then a standard 1.25" horizontal receiver would be my preference.