I like it. How about this: 1) based on previous spending habits of a user on the site, and/or credit score, social media profile or a simple age, location pro

I like it. How about this: 1) based on previous spending habits of a user on the site, and/or credit score, social media profile or a simple age, location profile, the shopkeeper (system) knows a rough geodemographics / personality of the user. 2) First price shown is variable depending on this algorithm. Some users who are poor will have cheaper prices. Richer ones, or users who like to spend time haggling will have higher ones. I've no idea if this is the best strategy - but some game theory and psychology of shopping will be used for the algorithm, you can work that out :) 3) User is able to purchase, or haggle. 4) Different users have different floors. 5) RNG - Sometimes a user will get a product for much less than the floor. They will feel as if their haggling got them a real bargain, because they really did! Sometimes the retailer will not sell the product unless they are making a larger margin than before. Retailers who use the system will feel as if they are making a real profit, because they really will be!