I agree with desiibond...i have tried buying shoes from bigshoebazaar, and a couple of things from ebay...indian online shopping has a long way to go in terms of responsible sellers and courier infrastructure (FastTrack couriers actually lost track of my shoes...luckily i had opted for the COD option); not to mention the ridiculous amount of shipping charges that some sellers levy.
Post a bad review for the delhi guy, and he'll respond. My advice would be that if the seller is not in your own city, then buy using the COD option only.
univercell.in is great for browsing around since they have a huge range of mobiles available, and have comparision features, etc. that halp you make a good choice. Very professional looking website. Unfortunately, they only deliver in chennai. Otherwise i would have given them a go.