I need a consultation to create an e-commerce mobile friendly store or Android app for a wholesale business (B2B) of grains and agricultural products . The main concerns are as follows which need to be solved by this app or e-commerce store :
1) The prices of products changes dynamically , for ex (say price of rice has decreased to Rs X/kg , within 20 minutes from now ) so if a customer places an order for a product and immediately within 1 hour prices decreases , there should be window for negotiation with the vendor either telephonically or it should be like those changed prices should not be seen to that particular customer but open for everyone else .
2) The order confirmation should be done by vendor depending on availability of quantity and other parameters.
3) Payment window is not needed essentially for now, maybe on a later stage it can be done .
Now , Firstly I need a suggestion based on the above details which should be a better option a e-commerce website or an App. But this should be user/customer friendly and mobile friendly .