Mouser and Digikey are very costly due to high import taxes here. Element14 in India sells only for businesses and requires a business number called TAN. I still have no option for FPGAs, debuggers and other ICs and have to go through Mouser and Digikey. I want a better deal for capacitors, resistors, cables, connectors etc.
I don't think it is the import taxes which make Mouser and Digikey expensive. (How would other vendors get those FPGAs or microcontrollers into India
without paying import duties?) Rather, it is the fact that they both keep a very large inventory and run a labor-intensive operation to grab, package and mail parts, often in small quantities.
In Germany, I find myself in a similar situation as you describe. For "exotic" parts I do order from Mouser, since the only sources in Germany are distributors who cater to business customers and are not interested in selling small quantities. (And I don't think there is any point in trying to convince them otherwise.) So I bite the bullet and order enough stuff to meet Mouser's 50 Euro order minimum to at least qualify for free shipping.
But the more common parts are available from local dealers here, who have a limited inventory, sell to private customers, in small quantities, at relatively low prices. What I can get from them I buy locally; only what they don't offer gets ordered from Mouser. Reichelt (reichelt.de) is my low-cost favorite; TME (tme.eu) is somewhere halfway between Mouser and Reichelt, both regarding price and inventory choice.
Those company names won't be of much help for you in India, I'm afraid. But I would expect that you have similar companies in India? Google find quite a few, e.g. robu.in, evelta.com; but you don't want advice on this from someone in Germany...
I think you just have to be prepared to use different suppliers and "mix and match" your orders. Expecting a supplier with a complete inventory, selling small quantities to private customers, and at aggressive prices is unrealistic. How would they make money?