Best places on internet to sell my old iPhone

Where can I sell my old iPhone 5? I was coming across many online portals where I can list my iPhone with its respective details for sell. But I'm not sure how much secured they're for selling such a device. I tried to sell it with my friends and known circles, but till now I haven't get any confirmation from anyone. So I think it's better to put the details in some website that people can easily see. Please let me know about your experience and suggest me the best places on internet to sell my device. Thanks.

There are many sites, currently famous are :
ebay.in
quickr.com
olx.in

There are few more , but these three are very popular. Now I am awaiting eagerly to know the site for which you started this thread.

Thanks Aarish. I was coming across a news site. Over there they've mentioned about quikr.com, olx.in along with two recommerce based sites ynew.in and Budli.in. Now the question is which one would be the best. I've to check the price of iPhone with all of them.