Up to 900 percent ROI.
A few days ago, a seller on COMC listed their copy of 2017 Panini Gold Standard Golden Rookies Autographs GR-JP Jabrill Peppers for only $3.25!
That particular card has "corner wear" and is serial numbered 061/149. Here's a detailed look at that card:
A buyer was very quick to purchase that card and relist it for $32.25. A few days later, it sold for an undisclosed price. In other words -- their return on investment (ROI) is up to 900 percent!
As a comparison, other copies of that card has been selling for up to $24.95 (excluding shipping and handling) on a popular auction website.
Images courtesy of COMC.com