HI If anyone is interested you can now buy a Microsoft 4000 Natural Keyboard from Amazon for $21. The first one of these I bought cost around 100 bucks years ago. I think I paid about $25 for the last one. I love the natural keyboard, it's so much easier to type on, but it has a lot of other features that I use as well. A key that brings up the Calculator, believe it or not I use this a lot. Now I get a new one with no food stains or grunge in all he cracks. LOL I keep a couple of the old ones around for a backup. If you've never tried one but would like to, it's very easy to switch over, and at this price you can take a chance. I've tried other natural keyboards but this one is the best. Now that they are so cheap I just buy a new one every few years (this is my fourth, I think I got this one at the same time I my present computer 3.5 years ago.) and have a nice fresh keyboard for next to nothing, I have Amazon Prime so I don't have to pay shipping either. Amazon.com: Microsoft Natural Ergonomic Keyboard 4000: Electronics Mike PS. I didn't notice that it says that this price is for Prime Members Only when I wrote the above post! They are having a free Prime for 30 days deal right now that you could take advantage of. If you are not a Prime Member it costs $35, still a great deal for this keyboard.