Startup Idea: Web App for Sourcing Cheapest Products with Fast Shipping Times for Online Retailers

Startup idea to develop a web app designed for online retailers for sourcing the most cost-effective products that ensure fast shipping times, providing a competitive edge in the retail market.

I currently run an online retail store. My biggest issue is being able to source the cheapest products to sell that will provide the fast shipping times. A web app that can solve this would be awesome!.