The article number stands for the manufacturer's name of the ink cartridge and the No. indicates the manufacturer's abbreviation on the label.
After toner change: The purchase prices for empty original cartridges are listed in the column Original empties. Only the printer manufacturer's toner cartridges are original.
After changing the printer: The purchase prices for full, originally packed toner cartridges can be found in the column Original surplus. The prices are only valid for toner cartridges in unopened, undamaged, unlabelled and unglued original cartons.
If you click with the mouse on the button in front of the respective article, you will get to the detail page of the corresponding empty ink cartridge. With the button you can add the respective article to the sales cart.