Refills are expensive! It's the cheap razor system but expensive blades idea. $55 for a box of refills - but I don't anticipate going through more than a box a year unless I'm sketching a lot! Normal art pencils are expensive too, Maybe $25 for a box that's double the quantity. So these refills are only 4x. And also, the refills are only available in 7mm B lead or 10mm 4B lead. In USA, we're not accustomed to using such soft leads sometimes. The good news is that you can use other brands of pencils as long as they're the correct size 7mm standard, 10mm magnum.