The problem is that in the past there were some very cheap motherboards available to overclock Intel processors well like the Gigabyte GA-P31-DS3L which were under £60. Even newer motherboards like the EP43-DS3L and EP43-UD3L which are great for budget overclocking are hard to get hold off and are above £60 generally.
Of course with the release of 770 based motherboards with the SB710 southbridge AMD now has a number of motherboards for under £60 which are superb for the budget overclocker. One is the DDR2 Gigabyte MA770-UD3:
http://www.scan.co.uk/Products/Gigab...D3-Motherboard
Most people can get the Athlon X2 200 series processors to at least 3.5ghz to 3.6ghz so an E5000 would have to be clocked higher to match it in games.
Anyway there is so much choice for the budget gamer nowadays!!