The disc harrows you are interested in are priced at $3,500. They require a minimum power of 30 HP to operate efficiently. The working width of the disc harrows is 2.0 meters, and they have a maximum working speed of 15 kph. Disc harrows are essential agricultural implements used for breaking up and smoothing out soil before planting crops. They are particularly useful for preparing seedbeds and incorporating organic matter into the soil. If you have any more questions or need further information, feel free to ask!