When it comes to these pants, you get what you pay for. A more significant price tag typically means higher quality. Highly breathable and durable fabrics cost more to make, as do extra features. More expensive ones are also better designed and will look more flattering on. Other qualities that make a pair of snow pants more expensive are waterproofness and a bib.
There are economy options. However, you do often loose functionality, versatility, and style when opting for the cheaper option. Another solution is to buy last year’s apparel. Also, if you can wait until the end of the season, many shops will have liquidation sales as they prepare to stock items for the summer.