How much should I spend on a sofa from Amazon versus a dedicated furniture brand?

Across the candidate pool, sub-$400 modular sofas attract mixed reviews on frame durability, while picks closer to $1,800 (like velvet-upholstered tight-back models) earn noticeably higher star averages. Specialist subreddits like r/BuyItForLife consistently advise that frame, suspension and cushion construction, not fabric, determine whether a sofa lasts five years or fifteen.