Yeah up through the early 80's my parents would've been buying me the insulin and I'm not sure I would've known the exact price.
I remember when I was in college that Lilly Regular and NPH were $7 at Walgreens. I seem to recall test strips were.... $15 for a canister of 25 chemstrips and were widely available by the time I was in college (earlier... not so widely available), and Testape for urine was so cheap that I think I could get a whole roll of the stuff for just a few dollars, that was pocket change even for a poor college student :-). Of course by the time chemstrips came along we all cut them into skinny little strips because nobody could afford them otherwise. There was another brand of fuzzy glucose-in-blood test strips back then... Ames? Those sucked rocks but when the pharmacy was out of chemstrips that's what I had to put up with.
Am I right, Testape came in little rolls? There were also bottles of clinitest tablets but I think those were... earlier, like when I was in junior high? I think the clinitest tablets were like a few bucks for a container too.