Use sites like CamelCamelCamel (for Amazon) to see the price history of an item so you know if a "sale" is actually a good deal.
Buy winter coats in July and swimsuits in January. Retailers slash prices to clear warehouse space for new arrivals. buy cheap items online
ThredUp or Poshmark (second-hand but high quality). Use sites like CamelCamelCamel (for Amazon) to see
Sites like Overstock, Sierra, or TJ Maxx online sell name-brand goods that didn't sell in primary stores. they might be fake.
Look for reviews with photos. If every review is five stars and posted on the same day, they might be fake.