$500 is a guess. itll probably be more.
i think the laptop dock is worth it if you will use it.
For me:
I work full time and go to college full time so I am never home. I need something portable to take notes on, watch movies, do basic computer apps and not have to worry about battery life. If i was buying the phone on contract, the dock + phone is $500, 200 for the phone 300 for the dock.
300 is the price of a super cheapo netbook. The dock is all metal, has a really nice keyboard, is super light, and has 2 usb ports for mouse and external memory (HDD)
but thats just me. everyone has their reasons for buying/not buying the phone. being the phone whore i am, id probably buy both at full price, but i am buying a new car in the next couple of weeks and i need all the cash i can get for the down payment.