This cute dress is Banana Republic, for less than $10. I added a belt of my own because the sash belts that come with most items are not all that.
Beyond the literal treasure of finding nice brands for a good price. A trade secret is todo a bit color research before even entering the store. If your arent sure which colors are in season, ask your favorite search engine, or look up couture runway shows. In most thrift stores everything is arranged by color- Good finds start to stand out, like cashmere, wool, linen. Personally I am always drawn to bright jewel tones regardless of season, layering with neutrals creates a polished silhouette that doesn't look too busy.
The only thing not thrifted in this fit is the boots and the bucket hat. Don't be afraid of bold colors or accessorizing. This jumper/ romper is on my Poshmark right now and it's so cute- because it is all about how you style it.