Anyone recommend a cheap, but good, gaming mouse.

I'm using now Logitech G100, ~20$.
9+++ of 10 my score.

Clicky mousey 12/10

i'm using the A-tech X7 mouse, pretty decent. you have 2 thumb buttons with an extra button next to the wheel. it comes with a nice software to program macros and let you change between 2 different configurations with one keyboard button.
you can get it for $30-40 on the internet.

my mouse it costs just a few dollars of my regions money over yours.

Then there's this one. I've never used it, but red dragon mouses aren't shitty and they seem to be good entry-level mouses for people who're trying to get into gaming seriously.

$20 logitech never failed me.

I use a Razer DeathAdder now, but that might be out of your current price range. Previously I used the Roccat Lua, which was PCMag's Editor's Choice for a budget gaming mouse. Here's the PCMag Roccat Lua review. I think this falls within your price range, so it might be worth a look. I hope this helps.

I recommend my mouse! The Anker mouse. 8200 DPI, 1000 Polling Rate and 9 buttons! All for around £20-£25!

The Logitech G400 is what I'm using now - read that first review for some detail. It's an amazing little gaming mouse with a very comfy shape for prolonged use, no angle snapping / prediction, a very precise and fast sensor, and it goes up to 3600 DPI (absolute overkill unless you're using like, a 40 inch monitor, but whatever). And as all mice worth consideration do nowadays, it supports a 1000hz polling rate. I bought it for 35 euros, you should be able to find it for a similar price with some digging.

The CM Storm Xornet is nice and inexpensive gaming mouse even before sales.

… Just NEVER look directly into the light sensor when you flip it over for a quick clean. It could blind you!

G400s. Or the G402. Similar MSRP.

http://www.newegg.com/Product/Product.aspx?Item=N82E16826146032&nm_mc=KNC-GoogleAdwords&cm_mmc=KNC-GoogleAdwords-_-pla-_-Gaming+Mice-_-N82E16826146032&gclid=Cj0KEQjwtb6hBRC_57Pvyfn66LsBEiQAtlFVu98ADZOKegI0-DFYZwe-Pr-UAfe12vlMils179uhPZcaAtwN8P8HAQ

I don't own this one, but I do own the M7 Thor, look verrry similar. The Thor is quite a good mouse. I couldn't recommend unless you have large hands though. It's a bit big for me and I'm 6'1.

http://www.amazon.com/E-Blue-Junior-EMS129BK-R-Balanced-Accurate/dp/B00ACJGTKO