Where you get the experience matters. Experience at K-Mart is not usually equivalent with experience at Saks Fifth Avenue. The firm, branch, department, manager, and the time period are all important variables that can't be ignored. Experience does not guarantee success. When the gaps in experience between candidates is in the 1 - 3 year range, there is no value in counting additional experience.
Experience is expensive.
As a rule the more experience you demand the more you will pay. There is little data to prove that the more years of experience correlates with performance in most jobs. Improvement in performance does not come with more months of experience. Don't assume experience is worth it, track the learning curve at your firm for all key jobs and see if the extra pay is worth it. More might be bad.