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So, here's a cheap Asus EEE at Scan, available for GBP 181.84. You can easily increase the amount of memory to 1GB using standard DDR2 SODIMM modules and you can boost its Solidstate capacity, both upgrades should cost you roughly GBP 20 extra. If you want to know more about the EEE, use the search facility on HUKD's website.
Forgot to add that it is in the Today's Daily Section in SuperSavers