I thought the buyer was insane to buy it at that price. But, of course mine had a decent spec and still had the Apple care warranty with very low battery cycle count. After the sale, the buyer told me the truth: The M1 is the best chip Apple ever made and I wouldn't see much of a difference in real world between the M1 Pro and an M3 Pro unless it was the Max version of the chip.

I didn't believe him then. But, after a year of being on M3 Pro, I gotta say he was spot on. Don't get me wrong, the M3 Pro is definitely faster in a lot of things. But not 3x or 2x faster like Apple always like to market. I can open a few extra tabs without slowing down, compile times (Elixir) did get somewhat faster. But definitely not faster to the point where there were two generations worth of performance improvements like Apple claimed.

The M1 chip series is vastly underrated.