[Durham] Three button mice

[Oliver Burnett-Hall]

Can anyone recommend a decent three-button mouse?  And I mean a real
three-button mouse, not a two-button-plus-scrollwheel one.

Recently I've been surviving on cheap and nasty ones from Maplins, but
they don't seem to stock them any more, and my current mouse is really
not feeling very well (the ball sensors keep on sticking even after
cleaning, and the left-button microswitch keeps on firing multiple
clicks every time I try and single click).

Google has suggested the HP DY651A, but that's about £25 which seems
expensive for a basic mouse.  I wouldn't minde that price if I knew it
would be reliable, any idea if HP rodents are any good?

- olly