The Microsoft Comfort Curve Keyboard 2000 was purchased at a retail price of €16 (+shipping). That's the price for DSP packages (the ones that come with new PC). I assume that the retail package could cost much more, but look for the DSP packages if they are available at your store. The price is very good, considering that you also get a Microsoft Optical Wheel Mouse. Let's unpack the contents:

The Comfort curve keyboard, as you can see, has the noticeable curves.

For a higher resolution image, click on the following photo:

Closeup of the qwerty key layout.

On the right, we find the standard numeric pad, the four arrows keys and Insert/Delete/Home/End/PageUp/Down keys.

Lastly, at the top we find several buttons for the Internet functions and sound control, up/down/mute.

Underneath is the Product ID, Part No., and various certifications.