Earlier i tried free WordPress plugin "Global Translator" which didn't translate when i clicked on any flags and redirected me to the home page of my website.

Same thing happens with "Angsuman's Translator Plugin".

Check it on my website:
http://www.curehalitosisbadbreath.com

Why is that?

Your copy of Translator is unlicensed and will not work. You need to obtain a valid license for Translator Plugin Gold here.

You know what? I don't want to take any chances or guess work whether it will work on my blog and not. There is a reason all similar translator plugins do not work on my blog and i tried many.

So i will not buy unless you provide me with demo

We don't provide demo for the product as the product is visible on our sites.
We provide 6 months of free support which essentially ensures that the plugin will work on your blog. So you can be rest assured that it will work on your wordpress blog.