Affiliate Store-Front Solution

I’m looking for a product to create a store front like website, without the cart/checkout/payment backend. (IE. Add/Remove products like an e-commerce website, but no checkout function)

I want the interface to feel like a regular e-commerce store, but instead of a “Add to cart” there is a “Buy now!”. I LOVE how has this setup on most of their products, it looks extremely clean and professional… but still has the basic functionality (description, reviews, ratings) of a e-commerce website.

I understand there may not be a solution entirely tailored to this need, so what would you recommend me using as a base (what isn’t a pain to modify/looks good?)
Open source is probably required here as I will be editing how the site works.

Thanks in advance!