Hard drive enclosures?

[bloodhunter]

I have a 3.5" 500gb Sata hard drive I'd like to use as an external device.
I've been looking at some USB 3 enclosures. Are these things pretty much the same? Any recommendations or any I should avoid.

I have seen some around the £15.00 to £20.00 on he bay but I'm uncertain of their quality etc...

Thanks.

 

[bloodhunter]

Is it for 3.5" or 2.5"

its for a 3.5