The last time I had a bad experience with an e-commerce site was when I used sosasta.com. I have bee a regular user of group buying sites and have tried multiple times with different ones have have never came across a bunch of cheats like sosasta.com.
They take your money, they dont deliver your goods, keep making false promises about the goods delivery and then finally will say, we cant deliver you goods, may be we can return the cash to your sosasta account and you can but in future from us. Awesome way to take your money keep it with them use it for business.and they might not have a good deal which you can buy from. And if its good on one or the other pretext you will not be able get it.
If you dont believe me you can yourself check for consumercomplaints on their website about sosasta. choice is yours you want to loose money go ahead do business with them.