With those specs, there's really nothing wrong with picking up a used gaming laptop for pretty cheap. A lot of gamers are notoriously careful with their rigs and many like to upgrade every couple of years. You can likely find a good 3080 laptop that looks brand new for cheap.
Heck, right now there's a person near me with an Asus rog strix with a 14th gen i9, 4080 gpu, 32 GB of ram, and an 18" 240hz screen and he just wants $900 for it.