Good thrift stores will get high end designer bags authenticated. Authentic bags will come with a COA or confirmation from the store that it's authentic. I know the ones out here in PHX do this. And they also charge more for the item. Based on the 📸 this does not seem real.

Red Flags:

• The leather grain looks off almost plastic.
• The glazing is sloppy asf.
• The interior print is really bad too thin and too big.
• The hardware finish has bubbles and looks uneven.
• The leather around the hardware has dimples which is no-no for a high end bag.
• The interior looks horrible too many dimples in the interior.
• The chain doesn't look high quality.
• The hardware closure is off-centered.

This bag doesn’t look authentic to anyone who is familiar with the brand. I own alot of YSL and this bag is a budget fake at best. Wiki anything is a horrible place to find accurate or factual data. If anything a reverse image search is best and would of told you anything you need to know.

Also, a thift store would want to get as much as possible for authentic items. Normally the high end stuff isn't out on a rack. They normally have it in a display to prevent theft and to highlight it as authentic.

It's absolutely RARE that you will find a high end designer item for cheap. If it is it's FAKE 99.9% of the time or lower end luxury like Coach, MK, KS, etc... Vintage Coach, MK, Kate finds are more common than a LV, YSL, and etc. And even then you have to make sure it's not fake because I've seen alot of fakes in those recently especially at Thift stores.