Complex sentence: Ultimately, even with such discounts, Modelzone was unable to compete within an expanding online marketplace while covering the cost of running a national highstreet chain offering no apparent difference between product price in-store or online offerings.
Split into simpler sentences: Ultimately, even with such discounts, Modelzone was unable to compete within an expanding online marketplace while covering the cost of running a national highstreet chain. With no apparent difference between product price in-store or online offerings.