Motor mounts

Do they need to be replaced? Is your motor thumping when you take off, or are you just replacing them as a maintance precaution/Suggestion?
You don't need to replace them unless they are broke. Unless you really want to.
But goto autozone. Com and you can get a price. Most mechanics will chage you around $100 to replace them. If you buy them from Autozone or Checker first, but it will cost you double if the shop buys them and replaces them too.
I hope this helps.