Is silk cheap to buy?

Could you please elaborate on the pricing of silk? I'm curious to know if it is considered affordable or if it falls into a higher price bracket. Could you provide some insights into the factors that might affect the cost of silk, such as its quality, origin, or processing methods? Additionally, are there any specific types or grades of silk that tend to be more expensive than others? I'm interested in understanding the overall cost structure associated with purchasing silk. Thank you for your assistance in clarifying this matter.