Price Check on a Laptop please as about to sell

Hello there !

With great reluctances I am selling my laptop and I need to know how much it is worth. Its in excellent condition it still has the plastic protective film stuck onto it. - I know how to take care of my stuff. I have traded many times on this forum so can provide references. Basically what can I expect to get for the following Laptop.

Specs are

Inspiron - 1.4Ghz - 60.00Gb HD - 512.00Mb Mem - DVD - Modem
1Y CAR (Collect and Return )
- 128MB ATI M10 (9600 Pro ) Video Memory Card - - 15.4 WXGA Screen - Inspiron 8600 -
- 512MB DIMM (333MHZ) (2 X 256MB) - - 60GB (7200RPM) IDE Hard Drive - -
8X DVD Drive (Media Bay) - - AOL, Dellnet + Tiscali ISP Combo - UK - -
Back-up Drivers for 8600 - - Dell Media Experience - Inspiron - - Dell
Picture Studio Image Expert Standard - UK - - Documentation 8600 -
English - - DVD Decoder S/W - - Inspiron 8600 Pentium M 1.4GHz 15.4 in
WXGA - - Intel Pro WLAN 2100 802.11b Mbps - - Internal 56K Modem
Notebook - UK - - Internal Network Card - - Lithium Ion 72Whr 9 Cell
Primary Battery - - Microsoft® Windows® XP Professional (SP1) -
UK - - Microsoft® Works® 7.0 - UK - - Norton AntiVirus (90-
Day Trial) - UK - - Paint Shop Pro Standard - UK - - Ship Notebook 8600 -
UK - - Windows XP Drivers for I 8600

This has 7 - 8 monhs warranty return to base on it.
Any ideas what its worth ?