There's nothing wrong with saving a few bucks - Hell, I bought used cams to replace my (badly worn) cams. Even though they were the lower-power ones I didn't care - I am 500% sure I get more power/better running with these than the ones I had on with flat lobes! (I was told they were from a 74 450SEL, and the PN is different)

Now, if you want to know... I paid $90 for the pair, with shipping!