I collected a few of these (and similar ones) some yrs ago now when the 52 Topps cards I needed were getting tougher to find and these filled my collecting void.
Never paid much for them as most know they were after thoughts to most people with some absolutely detesting just the head shots.
Like some others have mentioned, I thought having a card full of HOFr's, whether their rookie or not, was pretty cool. (I even purchased, mistakenly, the same card twice.
)
Couldn't tell you the last time I purchased one (2-3yrs?) but I'd have no qualms purchasing more if I saw one I liked.