you can also join the easy option that is to group in the ebay powership programe. that way it will cost a lot cheaper and also gives access to 4 different couriers, so you dnt hv to depend upon tieup with only one.
while most couriers give you a quote quite easily these days once you prove them to be able to provide regular couriers, around 30-50 atleast a month, means able to give them a business of around 3000-4000 atleast.
its easy to get quote from dtdc, firstflight, aramax etc. bluedart also gives good rate but you need to contact the branch incharge directly for that and not to any delivery office.