Most plate that are that damaged hold little to zero value. However, if it is rare or in very high demand, someone may be willing to buy it. After all, you did! Check out the plate online. If you can identify the plate, look it up on Kovels or Replacemants, or another site to see how much it is selling for in good condition. If the plate is selling for a very high price, you may be able to earn a few dollars. There are some highly desired pieces that can only be found in a damaged condition.
Some people buy damaged plates for use in mosaic projects or jewelry making. They break the plate and use the pieces. But I would hate to see such an old plate wrecked on purpose. If I had one like that I'd put it up on my hutch and smile. If that plate could only talk.