Toshiba Satellite 1800

I want to sell Toshiba Satellite 1800 , Using from 2 years bought 2nd hand from my friend. I have no idea whats the price I should offer for it, I added wifi card it was not built in.

Configuration:

1.1 Ghz Pentium III

30 GB H.D.

256 RAM

Wifi Card

Built-in Speakers

Charger

Battery approx 30 mins backup.

15 inch or 14 inch lcd, I don't know

Only interested "people" contact , and I am expecting fair offer for this system.