Opt for natural materials and a simpler style. Cheap materials do not look flattering.
Stay away from cheap patterns or overdone sequins and embellishments. Instead, you reduce and refine your look and end up looking more expensive. The cheaper the budget is, the cheaper the embellishment and the sequence look.
Bandage or another tight fitting dresses that are too short and have a deep neckline look like a desperate call for attention. It does not mean that mini dresses are completely out of the question. You can still look elegant if you keep it very light and moderate.