Hey Shan, It depends on the website but they typically come in packs of 25, 50 or 100 sheets and you’re only required to purchase 1 pack. Price will be determined by the type of cardstock (color, weight finish), but they typically range from $8.99 to 29.99 plus S&H. I have actually purchased a lot of my metallic cardstock from Michaels. I waited for their 5 for $1 sale and used a 20% off entire purchase coupon which is by far the cheapest price that I’ve found ($.16/sheet), and they were actually in the colors I wanted. I totally cleaned them out (went to two Michaels), and probably purchased more than I needed, but I have 60 days to figure it out and make return as I deem necessary.