It may be difficult to tell from the photos, but I've pushed the grinding as far as possible with the real blade, and the edge is still sharp, so please rest assured. Also, the black mark on the lower right of the base is dirt. The mouth is also filled, so the blade mouth is narrow, making it easier to stop the reverse grain. The bend is shallow. There are no other particular problems. I've cleaned off the dirt, but it's an old base, so it's less likely to warp. There was also some rust on this, so I've removed the dirt and wiped off the oil, so please rest assured. Please refrain from price negotiations, except for bulk purchases. Also, please consult with me in advance for bulk purchases.