Yes and yes. I hate it when I find a product that's perfect for my needs and then it gets discontinued. The Logitech trackball was one of them. It's one of those tools that (after you get used to it) just becomes an extension of your hand.

The wireless (which is what I'm using at the moment) is okay, but it's not the same.

I've got some dead ones in the junk pile. When I get some time I'm going to see if I can cobble together a working unit from them.