Three main factors affect the cost of replacing a starter:
Your vehicle make
Your vehicle model
The location of the starter in your engine bay
On complex vehicles with dense engine bays, it may take several labor hours just to reach your starter in the first place.
Whether or not a starter is new or refurbished doesn’t really factor into the cost since replacing dead starters with refurbished ones is the industry norm. Brand-new starters are typically reserved for repairs covered under factory bumper-to-bumper warranties.