Imo anything except stuff from giant pc-makers like dell who have their own weird proprietary cases and mobos and whatnot. Any normal IBM clone pc is gonna be

Imo anything except stuff from giant pc-makers like dell who have their own weird proprietary cases and mobos and whatnot. Any normal IBM clone pc is gonna be fully moddable / upgradable. For example if u wanted to check if u could put a new bigger GPU in, the main thing is just check if the mobo has big enough pcie slot for the card (x2, x4, x8, etc.) and also check if the PSU can provide enough wattage (If theres already a big GPU in it then its probably fine, newer GPUs tend to perform better without using anymore watts) I just go on 2nd hand sites like adverts.ie (I guess in USA maybe craigslist is similar?) and search for "gaming pc". There is definitely a learning curve to choosing new components to swap in. But if u just buy a 2nd hand gaming pc that can already play games then u cant go wrong, no upgrades necessary.