Shops and products
A product page is a shop window that has to sell with nobody standing behind it.
You are not competing with the shop down the road. You are competing with something similar on a marketplace that already has the buyer's card on file. The one advantage you hold is that you can make the thing look like it is worth the money, and that is photography, type and restraint rather than another badge saying free delivery.
These are real shops with real product pages, built and shot and graded. Look at how much space each one leaves around the object, and how little it asks you to read before you understand the price.
Nothing here is a mockup. Each one is running on the same machine that would run yours, and putting your own name into one costs nothing and takes under a minute.