There is a public market. Why would you be scared of prices? Do you question prices at your local stores?

Go to 3 stores and then shop. Or go to your usual place.

CS equivalent: Check prices over a period of time until you feel comfortable about price.
Know that price is versus time and your convenience. Sometimes, you can make back the gold and have the item to use before you find the equivalent item at the right price in the CS. It's all your own choice.