I have 3 Macs available for sale.
One is a new (unused, open box) M5 14" MacBook Pro (black) with 16gb ram and a 1tb drive. This is the latest model. I opened the box but never went beyond the Hello screen. It is covered by the optional AppleCare+ which gives you 24/7 tech support and accidental damage coverage. Apple price is $1898, Best Buy has it on sale at $1748, but I am asking $1595.
A second is a 2019 Mac Pro with 4tb of Apple OEM SSD storage, 192gb of RAM and a 32gb Vega II GPU. I have it running macOS Sequoia but you can upgrade to Tahoe v26.2 if you don't mind the "Glass" user interface. If you edit large, high resolution camera images or 8K video, this Mac was made for you. If you need (or just want) a single computer to run both macOS and Windows, this Mac Pro is for you. Complete with Apple Magic Keyboard and Magic Mouse, I am asking $1795. The current Mac Pro similarly configured is $9600. A similarly configured Mac Studio is $5000. A vastly lower spec Mac Mini M4 Pro is $3500.
Lastly, I have a 2017 27" 5K iMac with 8gb of upgradeable RAM, and a 1tb hard drive. This one was manufactured in October of 2018 and is like new. It is running macOS Ventura. It features the quad core Intel i5 processor, the 5K Retina display, and a 4gb Radeon Pro 570 GPU. With keyboard and mouse, I am asking $295.