I have been buying from Ebay for a very long time and ( touchwood) they have never disappointed me.I am a fan of their delivery.only flipkart can match that.The best thing about ebay is the feeling of security you have while ordering anything.
May be it has to do with Ebay being a world beater brand.There are few drawbacks like poor product descriptions and photographs, sometimes high delivery charges etc. but nevertheless its a good site to get things at a very good price.