Good first impressions. I like the category/brand search. I clicked on one link which opened another tab, which wouldn’t allow me to return to the site (which was ok because it was in the other tab - I generally detest this behaviour, but it may just be the retailer I clicked). I would say the business model isn’t immediately clear. Maybe an infographic could help? I think an about us page could help, but alas I doubt I represent the average users behaviour.

Have you thought about having some sort of cart functionality? I fully understand this does not align with what you’re looking for, but wondering if you could make your conversion funnel stickier by some sort of cart process. I’m just slinging ideas out here, they don’t have to be good.