I can see this being useful if there was a time limit, shall we say, of 5 minutes imposed on being able to refund it. To freely be able to refund at anytime, as Chavex mentioned, would defeat the purposes of tokens and tokens would be treated as tradable expertise points.
If you don’t return the jewelry piece in question within, maybe 5-10 minutes, then it’s non-refundable. If you trade it to someone else, even an alt, it’s non-refundable.
At that point, you’re still given the ability to test things out and are given enough time to see how it works. Just to add my two cents.