They sell used macs as well as upgrades. Macs do tend to maintain their value for a few years anyway, so you don't get a huge discount on newish machines. But they're a great source for older hardware on the cheap, and it comes with a short warranty that you can extend. Customer service on the phone is also excellent.
Thanks. Reading the link now.
MacBook Pro - Catalina 10.15.7 Safari 14.1.1 Music 220.127.116.11 iPhone 7 Version 14.1