I bought 10 or so of the original Trackman wheel back when I discovered it stopped my hand hurting (assuming, correctly, that they would stop making them at some point). I still have 2-3 of them new in the box. I have mostly switched to the wireless variant which as you note is ok. I don't like that it steals a USB port though: I would prefer it use Bluetooth, even if that made it 2x the price.