Groupon Clone comparision

HI All,
I like to build a groupon clone for my region.. There exists so many groupon clones in the market. which one is best? Any reliable scripts you guys come across? Unfortunately, the companies which claims their script is best ( contus, agriya etc ) is really not the best one. All those companies have very poor reviews in complaintsboard.com and other ratings websites from many unsatisfied clients. Please give us ideas about how to chose the best for my site.
Thanks

See original post by sasmitha