It depends on the storage it has. I have a M1 12.9 and a 2018 12.9. For now I am keeping both, but at some point in the future I might sell the 2018 one, I'm probably going to put the 2018 at $490 (256GB, 94% battery) so I would say $460 is definitely not bad for 128GB and not terrible for a 256GB model either....What about 2018 12.9” to 2021 12.9 M1? Got an offer of $460 for my 2018. Pretty low 🥲