Microscopes

[iPeppers]

I'm trying to find a cheap microscope for hobbyist purposes, with emphasis on 'cheap' (not bad quality, just good bang for my buck).

 

I'm just interested in optical microscopes, probably binocular, and with magnification at least as good as the basic ones that I've used in college and university (10x eyepiece, with 4x, 10x, 40x, 100x objectives).

 

Can anyone help me out? I've been blindly searching around the internet, and sometimes microscopes that look almost the same to me differ in $100 for no apparent reason. Where should I look? Do you know of any decent online shops?