I was just checking around, trying to find a small trackball device to use with my laptop. While my search turned up nothing I'm too keen on, I did come across something else.
Years ago, I bought a Logitech Trackman Marble FX. I loved the look of it, and it was the only trackball that was operated by the fingers instead of the thumb. Thumb operation, I was afraid, would introduce some repetitive stress injury, thus I avoided all other trackballs. Plus, the ergonomics of this thing just
looked comfortable. I felt it wasn't quite designed for games, but as a general PC tracking device, I felt it was matchless, and well, I could go on, but this isn't meant as an advertisement.
Well, after finishing my search, I decided to check to see what it was worth. I was absolutely astonished to find that there were three on ebay currently going for over $80. USED! I checked some of the finished auctions. There were two auctions that sold for over $200 (
used again) and another auction that ended at $280 for a new unit. Damn near $300 for a trackball that probably cost $40 retail when it was introduced or so. And even less if you caught it on sale or off ebay. And these were bidders that according to feedback, paid for the item!
Well, I've got an item to sell here soon.

And with any luck, they'll reintroduce the design sometime soon again.