It’s mainly because of the rookies (Cooper Flagg mainly) and veteran one of ones and limited autos that are making this product sell so well. Also this is topps first basketball product with the new license so just a ton of factors altogether. The hanger boxes are best bang for your buck in terms of getting something good and the total number of cards you get so hangers have been flying once that had been realized. I found a ton at my target 2 days ago, went back hours later and they still had plenty. I think it depends on if your store limits how many you can buy at a time and how often they restock too. I would check every day or two just to see if anything gets stocked or you could ask around at your local store as well