From 1964 through 2001 most Kennedy Half Dollars have high mintages exceeding over 20 million. While other dates from that time frame have mintages over 200 million. However, the 1988-P Kennedy Half Dollar only has a mintage of about 13.6 million, making it much scarcer compared to most other coins struck from 1964-2001. Beginning in 2002 mintages were drastically reduced.
The 1988-P Kennedy Half Dollar is difficult to find in MS67 condition or higher. Anything grading lower is fairly easy to find or buy very inexpensively.