In Japan they'll sell for about 25 dollars, and once in a while they'll show up on eBay for about 50~75 dollars.
The most special feature bout this pet is the Touch screen. You can pet, praise, discipline and even train your pet to do tricks by touching different areas on the screen. Touching the right area on the screen during certain activities will improve their mood (happiness level) or increase their intelligence level.
Like with other pets you can praise and discipline it, but this time by using the touch screen!