price of Microsoft Natural Ergonomic Keyboard 4000,,,,,,,,

Becoz of too much pain in wrist ,, bec oz of typing finially i have made decision to go for ergonomic keyboard ,,,and mouse,
after making some searches on google i got this useful as per editiors opinions and reviews,,,,,
i want opinion of all digitians then only i will make decision,,,,,

product is ,,,,

Microsoft Natural Ergonomic Keyboard 4000

i want u r suggestions and price in pune or bombay

about mouse give me suggestions too,,,

regards
manoj