I would suggest your friend to find a suitable eCommerce system then hire a developer to create a custom design and whatever else he needs
A friend of mine needs to get something similar to Cheap flights, hotels and package holidays eDreams done.
Including ecommerce, offshore. Also needs to compare to exising services such as edreams and offer fares based on their prices.
Please let me know how much you could finish a project like this one for.
He is looking for a bargain.