I was looking at the old refurb 16" Intel MacBook Pros last week: had one at near $6,000 and a less extreme one at around $4,000 (32 vs 64GB RAM, 5500M vs 5600M, and 2TB vs 4TB SSD). That's a lot of money to ask for something with a 2018-era CPU and a 2019-era GPU.
At least you'll get more performance and battery life out of these new ones.
The pricing of the current M1 Mac Minis and MacBook Air computers, especially refurbished, offers one of the better values I've seen from Apple (relatively) in years.