Most of the people complain about ebay that ebay products are expensive than other sites and they sell fake products. But thats half true. You can get some crazy deals on ebay like you can buy refurbished smartphones at cheaper price and unlocked devices too.
Iphone 5s 64gb price in amazon and flipcart is aroun d 38k but in ebay you can buy a unlocked iphone or refurbished at 22k.
I have also tried ebay by ordering a memory card combo of 32gb+ 32gb sandisk ultra cards at 550rs.the deal is good and products are original. The packaging is not too good but I got that memory cards.
Some delivery issues are there in ebay like late delivery or something
When you buy a product from ebay remember to check the seller rating is above than 75% . So you will receive a good product