Ink is something I've sold and filled for customer for years and some ink cartridges can sell for up to about $100 for the set, with most costing around $66-$70 depending upon the amount of .mil the cartridge holds. Buying ink, paper, a high quality printer, the cases, and doing the cutting would cost a lot and would take up so much personal time of mine that I just don't want to deal with it, so buying these cases works well for me.