Yes, you can get some real quality stuff. My daughter does the same and gets great quality modern styles and colours for a fraction of the price they were originally. Some never worn. She wears them a few times and sells them on. Great if your shape or weight changes.
Some early versions of Jaeger can be exceptional. What has to be checked is that a few years ago, sizing was adjusted to cater for changes in shape. Suggest asking for measurements eg across the hip, waist, and bust as a minimum, as well as the size in the garment.
I have a very heavy silk skirt, looking like liquid pale gold, wool skirts, cashmere jumpers etc. Don't be shy. Look for fancy names too. Dior, Valentino, and so on.
Very eco sensible.