my laptop hdd failed, so was searching various sites and this is the cheapest i found using IDE/EIDE/PATA interface.
Product Description WD Scorpio WD2500BEVE - hard drive - 250 GB - ATA-100
Type Hard drive - internal
Form Factor 2.5" x 1/8H
Dimensions (WxDxH) 7 cm x 10 cm x 9.5 mm
Weight 117 g
Capacity 250 GB
Interface Type ATA-100
Data Transfer Rate 100 MBps
Average Seek Time 12 ms
Spindle Speed 5400 rpm
Buffer Size 8 MB
Manufacturer Warranty 3 years warranty
next cheapest was 57.23 on ebuyer but that also has delivery charges
the price is even cheaper then ebay prices which start at £55 including delivery but are all from various other countries
before buying check if your laptop is IDE/EIDE/PATA interface as it be one of the SATA interfaces.