A group of Black Friday online shopping purchases photographed in delivery boxes filled with polystyrene packing pellets, taken on September 13, 2019. (Photo by Neil Godwin/Future Publishing via Getty Images)Future Publishing via Getty ImagesE-commerce now spans two models: large-scale platforms like eBay and niche marketplaces like Etsy. While both connect buyers and sellers, their growth and valuations differ sharply — a gap that may signal an overlooked investment opportunity.ETSY serves as eBay’s counte ...