This is the listing OP posted for $499: https://www.amazon.com/Dell-OptiPlex-5060-Computers-Refurbished/dp/B0C3LJYLSY/

This is the full size desktop for $424: https://www.amazon.com/Dell-Optiplex-5060-Tower-Desktop/dp/B07VSLVCWT/

The fullsize desktop has a 512GB SSD vs. 1TB, but that's pretty minor and you can buy a second 1TB SSD with the $75 you save.