I would say eBay is my favourite shopping site without any second thought. My first online shopping was through ebay. It was my laptops charger. Since then I have made countless purchases.
My shopping experience with eBay went wrong two times. In both times sellers and eBay worked together to send me a replacement. I only buy from reputed sellers. Check feedback score before buying.
I also like eBay to offer better customer support. They sometimes never reply to emails. That is very frustrating. Phone support is the best option. One of the reason I like eBay because they offer coupons and deals with best prices compared to other site. Almost product can be found on eBay
I sold my galaxy s advance through ebay for 11k. I bought it the same through ebay for 13.5k. Love eBay and highly recommend the site to everyone. Search for your product, review feedback of seller, order, enjoy. Works for me.