If you haven't already experienced this, you will! Trust me, it's coming! Well since you can't just take it out of their cart...
What Should You Do?
2) Don't be a creeper! Actions can be louder than words. Staring at the person while they shop will only let them know that they have something that you want, in addition to making yourself look like a creeper. Only problem, they aren't sure which item it is resulting in them purchasing as much as possible and, more than likely, it was the piece you wanted.
I advise maintaining a safe distance from the person. Strategically plan your random walk by to check the person cart to see whether the item has been placed back on the rack nearby. Hopefully, they have done so! Trust me, it can happen!
3) Remain calm and wait for the PURGE! Cheap prices cause peoples pickers to go crazy. By the end of the thrift store run, they have more in the cart then they have budgeted for. So what do they do? They purge it. Typically, thrifters purge their carts of all the things they do not want in one of two places or a combination of both. The first purge place, the fitting room (if it is even an option). After trying on the pieces, they leave the unwanted items either inside the fitting room, in a pile by the fitting room, or on the nearest rack to the fitting room (I have seen all of these options before).The second purge place is at the check out counter. When the bill starts to reach a certain limit, people decide which items are keepers and which to leave behind. Either purge place is open to the public and hopefully you found what you were looking for!
I hope this advice helps you! Happy Hunting!