The 1930-S Lincoln cent is a tough coin in MS64 or better, which owes to the fact that relatively few examples were saved in uncirculated condition. This would certainly have something to do with the onset of the Great Depression, when most folks, including cash-strapped coin collectors, were more concerned about paying the rent than saving one-cent coins for posterity. This was the situation throughout the early 1930s, and thus in part why most of the branch-mint Lincoln cent issues from this time are relatively scarce in the higher grades today.