I need a basic business app to have current stock and prices available. Different customer types get different info

I sell wholesale seafood. I want clients to be able to open an ap, see current inventory and prices and send an order request . No funds transactions, almost like they are "reserving" what they want, how much they want and when they need it delivered and to where . I have different price lists depending on the customer. There could be password locked price sheets OR a way to designate the users so that the right users see the right price lists. It would be great if info could replicate info from we page. Not a rush on this project...web page isn't even built