Question
If Product A & B are identical, what can be a reason that Product A sells 5x more than B successfully?
I love button up short sleeve shirts, I usually buy them at $15-$30. I came across one I loved, but it costs a whopping $85...
Answer
I think it really comes down to the consistency of your branding—namely, your visuals. There are more e-commerce websites than there are customers. Use branding as a way to reinforce the quality that your customers are buying into. Achieving visual consistency (product photos, style/editorial shots, banners, logo/identity, etc.) will complement your move to be a premium brand. That's a classic example of how branding can become a powerful tool to achieve your business goals.
When you pay $85 for a shirt, you're buying into a brand.