Took all the advice, this i what i came up with and now have...
Ebay
IBM T43
£300 INC DEL/VAT
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2GHz Centrino
1GB RAM
80GB HDD
64MB Graphics(dedi)
Finger Print Reader
Wi-FI
BT
DVD-RW
92% Battery
+ all the usuals
It has 16 months warrenty left (result)
and the battery is lasting around 4hrs...
Its about 14/5 months old, but its not a bad spec, what i would consider usual wear...
Thanks for the advice...