Started in ‘85 so maybe one every three months the first few years, but I would beg, borrow, work, and plead to get a new one sooner. Definitely ramped up in the 90s, I once bought fifty blanks for $500 from South Central or maybe Clearwood when I had designs on starting a company, but, I mostly skated them myself, yet did give a couple to Dan Murphy when he was living in Hampton Beach, NH and didn’t have a proper board sponsor yet. I took a brief hiatus in my thirties to heal my knees. Now have joined the Over 45 broken leg Skate Club few months ago along with Cab, Hawk, Staab, but it feels good.
So all in, definitely over 500.