How to Choose MY Dell D520 Laptop keyboard??

MY Dell D520 Laptop keyboard is broken yesterday, I must change new Dell D520 keyboard, just I go to ?google? and find Dell D520 Laptop keyboard online store:
http://www.laptopbattery-usa.com/dell-latitude-d520-laptop-keyboard-dell-d520-keyboard-p-109.html
how about this D520 keyboard, can you tell me your best idea??