I think the point is more that "is it worth buying this new m3 or should I buy a secondhand m2 for half the price?"
By the time the M2 came around ppl knew what was up. So you might be able to find a bog standard M1 that low (they do show up) due to this… but it’s rare.
M1->M2 wasn't that big, generally seen as a small incremental improvement at best, and the last few Intel updates barely moved the needle between them.