Can one product be sold by different sellers at different prices?

Yes, the StoreHippo multi vendor ecommerce platform provides the price overrides and linked products features. You can use these features to sell the same product at different prices for different sellers. 

To know more about price overrides, go to the helcpenter - https://help.storehippo.com/topic/price-overrides

To know more about the linked products, go to the helcpenter - https://help.storehippo.com/topic/linked-products