If you need a simple website then it will take at least 5-10 days & if you need a total clone of Flipkart, amazon, snap deal then it will take at least 15-20 days to complete. Time frame totally depends on require features & functionality.
I can provide you such similar Flipkart, amazon, snap deal website with all the features & functionality you're looking for & provide you website fully mobile friendly i.e. responsive in nature which is compatible with the cross platform. Let me know how to get started now.
Please let me know if you have any single query.
Thanks & Regards
Ashish