I've read that he was Roberto Clemente's friend, so much so that he skipped the funeral so that he could go diving to try to recover Clemente's body (which was never found). I've also read that he has one of the food concessions at PNC Park, and you can get his autograph there.
Here are the two Sanguillen cards I have, the 1973 Topps and 1974 Topps.
|1973 Topps Manny Sanguillen|
|1974 Topps Manny Sanguillen|
I really like both the 1973 Topps and 1974 Topps sets. Maybe I'll set a collection goal to get more of them, say to get more Pirates from those years.